Yasuhide HOBARA
| Department of Computer and Network Engineering | Professor |
| Cluster II (Emerging Multi-interdisciplinary Engineering) | Professor |
| Center for Space Science and Radio Engineering | Professor |
| Research Center for Realizing Sustainable Societies | Professor |
- Profile:
1997-1998 Russian Academy of Science, Invited Scientist
1998-1999 The University of Electro-Communications, Assistant Professor
1999-2001 Japan Aerospace Exploration Agency, Invited Scientist
2001-2003 Laboratory of Physics and Chemistry of Terrestrial and Space Environments, Associate Researcher
2003-2005 Royal Swedish Institution of Space Physics, Associate Researcher
2005-2008 The University of Sheffield, Research Associate
2008-2009 Tsuyama National College of Technology, Associate Professor
2009- The University of Electro-Communications, Professor
Researcher Information
Research Keyword
Field Of Study
Career
- 01 Apr. 2009
電気通信大学 電気通信学部, 教授 - 01 Jun. 2008 - 31 Mar. 2009
国立津山工業高等専門学校 電子制御工学科, 准教授 - 01 Sep. 2005 - 31 May 2008
シェフィールド大学 自動制御工学科, リサーチアソシエイト - 01 Sep. 2003 - 31 Aug. 2005
スウェーデン王立宇宙物理研究所, リサーチアソシエイト - 01 Apr. 2001 - 31 Aug. 2003
フランス国立学術研究センター 環境物理化学研究所, リサーチアソシエイト - 01 Apr. 1999 - 31 Mar. 2001
宇宙開発事業団 地球観測データ解析システム, 招聘研究員 - 01 Apr. 1998 - 31 Mar. 1999
電気通信大学 電子通信学部 電子工学科, 助手 - 01 Apr. 1997 - 31 Mar. 1998
ロシア科学アカデミー応用物理研究所, 客員研究員
Educational Background
Member History
- Oct. 2021 - Present
committee member, International Science Council GeoUnions Standing Committee on Disaster Risk Reduction, Government - 01 Jul. 2022 - 2030
committee member, International Commission on Atmospheric Electricity (ICAE) - 07 Jun. 2018 - 05 Jun. 2024
環境電磁工学研究専門委員, 電子情報通信学会 環境電磁工学研究専門委員会 - 07 Jun. 2018 - 05 Jun. 2024
専門委員, 電子情報通信学会環境電磁工学研究専門委員会 - 22 Apr. 2021 - 30 Sep. 2023
委員, 日本学術会議 電気電子工学委員会URSI分科会プラズマ波動小委員会 - 22 Apr. 2021 - 30 Sep. 2023
幹事, 日本学術会議 電気電子工学委員会URSI分科会 - 22 Apr. 2021 - 30 Sep. 2023
Designated Associate Member, Science Council of Japan, Government - 22 Apr. 2021 - 30 Sep. 2023
特任連携会員, 日本学術会議, Government - 22 Apr. 2021 - 30 Sep. 2023
委員, 日本学術会議 電気電子工学委員会URSI分科会電磁波の雑音・障害小委員会, Government - 22 Apr. 2021 - 30 Sep. 2023
電気電子工学委員会URSI分科会電磁波の雑音・障害小委員会委員, 日本学術会議 電気電子工学委員会URSI分科会電磁波の雑音・障害小委員会, Government - 19 Apr. 2021 - 30 Sep. 2023
Secretary, Japan National Committee of URSI, Society - 19 Apr. 2021 - 30 Sep. 2023
主幹事, 電子情報通信学会URSI日本国内委員会, Society - 25 Oct. 2022 - 10 Jun. 2023
プログラム委員, 公益社団法人日本地球惑星科学連合プログラム委員会 - 29 Jan. 2015 - 31 Mar. 2022
プラズマ波動小委員会委員, 日本学術会議 電気電子工学委員会 URSI分科会 - 29 Jan. 2015 - 31 Mar. 2022
委員, 日本学術会議 電気電子工学委員会URSI分科会プラズマ波動小委員会委員 - 2009 - 2022
運営委員, 日本大気電気学会, Society - 01 Dec. 2020 - 10 Jun. 2021
日本地球惑星科学連合プログラム委員会委員, 公益財団法人日本地球惑星科学連合 - 29 Jan. 2015 - 31 Mar. 2021
電磁波の雑音・障害小委員会委員, 日本学術会議電気電子工学委員会URSI分科会 - 29 Jan. 2015 - 31 Mar. 2021
委員, 日本学術会議電気電子工学委員会URSI分科会 電磁波の雑音・障害小委員会 - 2002 - 2021
Working Group (E1 Terrestrial and Planetary Electromagnetic Noise Environment) Co-chair, URSI, Society - 01 Dec. 2020
委員, 公益財団法人日本地球惑星科学連合プログラム委員会 - 01 Dec. 2019 - 30 Nov. 2020
科学研究費委員会専門委員, 日本学術振興会 - 01 Dec. 2017 - 30 Nov. 2020
専門委員, 日本学術振興会科学研究費委員会 - 22 Mar. 2018 - 30 Sep. 2020
電磁波の雑音・障害小委員会 委員長, 日本学術会議電気電子工学委員会URSI分科会 - 22 Mar. 2018 - 30 Sep. 2020
委員長, 日本学術会議電気電子工学委員会URSI分科会電磁波の雑音・障害小委員会 - 07 Jun. 2018 - 08 Jun. 2020
プラズマ波動小委員会委員, 電子情報通信学会 環境電磁工学研究専門委員会 - 07 Jun. 2018 - 08 Jun. 2020
委員, 日本学術会議 電気電子工学委員会URSI分科会プラズマ波動小委員会委員 - 01 Apr. 2017 - 31 Mar. 2020
運営委員, 日本大気電気学会, Society - 01 Dec. 2018 - 30 Nov. 2019
科学研究費委員会専門委員, 日本学術振興会 - Apr. 2016 - Mar. 2019
実行委員, ICAE2018 - 01 Dec. 2017 - 30 Nov. 2018
科学研究費委員会専門委員, 日本学術振興会, Others - 01 Apr. 2016 - 31 Jul. 2018
運営委員会, 国際大気電気学会 - Apr. 2016 - 31 Jul. 2018
プログラム委員長, 国際大気電気学会2018実行委員会 - 01 Jul. 2016 - 30 Apr. 2017
プログラム委員, 冬季雷シンポジウム - 01 Apr. 2015 - 31 Mar. 2017
会計監査委員, 日本大気電気学会, Society - 01 Sep. 2014 - 31 May 2015
プログラム委員, 日本大気電気学会, Society - 1998 - 1999
選挙管理委員, 日本大気電気学会, Society
Research Activity Information
Paper
- Investigation of anomalous lightning activity during the January 15, 2022 Tonga volcano eruption based on measurements of the VLF and ELF electromagnetic fields
Alexander Shvets; Yasuhide Hobara; Masashi Hayakawa; Alisa Shvets; Oleksandr Koloskov; Yury Yampolsky
Journal of Atmospheric and Solar-Terrestrial Physics, 264, Nov. 2024
Scientific journal - Integrated Analysis of Multi-Parameter Precursors to the Fukushima Offshore Earthquake (M
j = 7.3) on 13 February 2021 and Lithosphere–Atmosphere–Ionosphere Coupling Channels
Masashi Hayakawa; Yasuhide Hobara
Atmosphere, 15, 8, Aug. 2024
Scientific journal - A Consideration of Heavy Rainfall Detection Method Using Multi-Parameter Phased Array Radar, Convolutional Neural Network, and Long Short-Term Memory Network
Tsubasa Goto; Hiroshi Kikuchi; Yasuhide Hobara; Tomoo Ushio
IEEJ Transactions on Fundamentals and Materials, 144, 4, 132-138, Apr. 2024
Scientific journal - Modeling of Solar Eclipse effects on the sub-ionospheric VLF/LF signals observed by multiple stations over Japan
Tamal Basak; Yasuhide Hobara; Sujay Pal; Toru Nakamura; Jun Izutsu; Tetsuya Minatohara
Advances in Space Research, Elsevier BV, 73, 1, 736-746, Jan. 2024, Peer-reviwed
Scientific journal - Time-altitude variation of 30-second-update full volume scan data for summer convective storms observed with X-band dual polarized phased array weather radar
Hiroshi Kikuchi; Yasuhide Hobara; Tomoo Ushio
IEEE Access, Institute of Electrical and Electronics Engineers (IEEE), 1-1, 2024
Scientific journal - Observation of Ultra-Low-Frequency Wave Effects in Possible Association with the Fukushima Earthquake on 21 November 2016, and Lithosphere–Atmosphere–Ionosphere Coupling
Masashi Hayakawa; Alexander Schekotov; Hiroki Yamaguchi; Yasuhide Hobara
Atmosphere, 14, 8, Aug. 2023
Scientific journal - First Detection of the Powerful Gamma-Ray Burst GRB 221009A by the THEMIS ESA and SST Particle Detectors on 2022 October 9
O. V. Agapitov; M. Balikhin; A. J. Hull; Y. Hobara; V. Angelopoulos; F. S. Mozer
The Astrophysical Journal Letters, American Astronomical Society, 948, 2, L21-L21, 01 May 2023, Abstract
We present the first results study of the effects of the powerful gamma-ray burst GRB 221009A that occurred on 2022 October 9, and was serendipitously recorded by electron and proton detectors on board the four spacecraft of the NASA THEMIS mission. Long-duration gamma-ray bursts (GRBs) are powerful cosmic explosions, signaling the death of massive stars, and, among them, GRB 221009A is so far the brightest burst ever observed due to its enormous energy (Eγ iso ≈ 1055 erg) and proximity (the redshift is z ≈ 0.1505). The THEMIS mission launched in 2008 was designed to study the plasma processes in the Earth’s magnetosphere and the solar wind. The particle flux measurements from the two inner magnetosphere THEMIS probes, THA and THE, and two outer probes (renamed ARTEMIS after 2010), THB and THC, orbiting the Moon captured the dynamics of GRB 221009A with a high time resolution of 4 (up to 8) measurements per second. This allowed us to resolve the fine structure of the GRB and determine the temporal scales of the two main bursts’ spiky structure, complementing the results from gamma-ray space telescopes and detectors.
Scientific journal - First Detection of Global Ionospheric Disturbances Associated with the Most Powerful Gamma Ray Burst GRB221009A
S. Pal, Y. Hobara, A. Shvets, P. W. Schnoor, M. Hayakawa, and O. Koloskov
Corresponding, Atmosphere, 14, 2, 217, 20 Jan. 2023, Peer-reviwed, False
Scientific journal, English - Spatial Distribution of Very Low Frequency and Low-Frequency (VLF/LF) Transmitter Signal Amplitude Associated With Lower Ionospheric Perturbations: Numerical Modeling and Observations
Yasuhide Hobara; Masahiko Iwamoto; Masashi Hayakawa
Lead, URSI Radio Science Letters, International Union of Radio Science (URSI), 4, 2023, Peer-reviwed
Scientific journal - Modeling Atmosphere-Ionosphere Coupling on Gravity Waves during 2019 Typhoon 15 and 19 using FDTD Method
A. D. Setiawan; S. Hirai; H. Kikuchi; Y. Hobara
2023 35th General Assembly and Scientific Symposium of the International Union of Radio Science, URSI GASS 2023, 2023
International conference proceedings - On the Spatio-Temporal Dependence of Anomalies in the Atmospheric Electric Field Just around the Time of Earthquakes
Y. Hobara; M. Watanabe; R. Miyajima; H. Kikuchi; T.Tsuda; M. Hayakawa
Atmosphere, 13, 1619, 04 Oct. 2022, Peer-reviwed
Scientific journal, English - Multi-Parameter Observations of Seismogenic Phenomena Related to the Tokyo Earthquake (M = 5.9) on 7 October 2021
M. Hayakawa; A. Schekotov; J. Izutsu; S. S. Yang; M. Solovieva; Y. Hobara
Geosciences, 12, 7, 265, 30 Jun. 2022, Peer-reviwed
Scientific journal, English - Spatio-Temporal Distributions of Lightning Stroke Charge Using ELF and Meteorological Data
Y. Hobara; T. Ohashi; T. Shiraishi; K. Shiokawa
Proceedings of the 6th International Conference on Electrical, Control and Computer Engineering InECCE2021, 842, 329-337, 09 Mar. 2022, Peer-reviwed
International conference proceedings, English - Spatio-Temporal Characteristics of Energetic Lightning in Southeast Asia: Preliminary Statistical Results
S. Akama; Y. Hobara; A. Izzani Mohamed; C. Gomes; K. Shiokawa; S.Hirai; H. Kikuchi; M. Stock
Proceedings of the 6th International Conference on Electrical, Control and Computer Engineering InECCE2021, 842, 317-327, 09 Mar. 2022, Peer-reviwed
International conference proceedings, English - Validation of X-Band Multiparameter Phased-Array Weather Radar by Comparing Data from Doppler Weather Radar with a Parabolic Dish Antenna, Journal of Atmospheric and Oceanic Technology
K. Asai; H. Kikuchi; T. Ushio; Y. Hobara
Journal of Atmospheric and Oceanic Technology, 38, 9, 1561-1570, 02 Sep. 2021, Peer-reviwed
Scientific journal, English - Thunderstorms and total lightning characteristics causing heavy precipitation in Japan: A case study
Debrupa Mondai; Yasuhide Hobara; Hiroshi Kikuchi; Jeff Lapierre
Corresponding, URSI Radio Science Bulletin, Institute of Electrical and Electronics Engineers (IEEE), 2021, 378, 70-76, Sep. 2021, Peer-reviwed
Scientific journal - Adaptive Beamforming Using Steering Vector Correction for Phased-Array Weather Radar
H. Kikuchi; E. Yoshikawa; T. Ushio; Y. Hobara
IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, Institute of Electrical and Electronics Engineers (IEEE), *, *-8426, 19 Aug. 2021, Peer-reviwed
Scientific journal, English - A Dynamical Model of Equatorial Magnetosonic Waves in the Inner Magnetosphere: A Machine Learning Approac
R. J. Boynton; S. N. Walker; H. Aryan; Y. Hobara; M. A. Balikhin
JGR Space Physics, 126, 6, *, Jun. 2021, Peer-reviwed
Scientific journal, English - Ultra-low frequency (ULF) magnetic field emissions associated with some major earthquakes occurred in Indian Subcontinent
Swati; B. Singh; D. Pundhir; A. K. Sinha; K. M. Rao; A. Guha; Y. Hobara
J. Atmos. Solar-Terr. Phys., 211, *, Dec. 2020, Peer-reviwed
Scientific journal, English - Clutter Reduction for Phased-Array Weather Radar Using Diagonal Capon Beamforming With Neural Networks
H. Kikuchi; E. Yoshikawa; T. Ushio; Y. Hobara
IEEE GEOSCIENCE AND REMOTE SENSING LETTERS, IEEE, 17, 12, 2065-2069, Dec. 2020, Peer-reviwed
Scientific journal, English - Fractal analysis of Ultra Low Frequency magnetic field emissions observed at Agra associated with two major earthquakes occurred in Pakistan
Swati; B. Singh; D. Pundhir; Y. Hobara
J.Atmos. Elect., 39, 1, 1-15, 15 Jun. 2020, Peer-reviwed
Scientific journal, English - Initial Observations for Precipitation Cores with X-Band Dual Polarized Phased Array Weather Radar
Hiroshi Kikuchi; Taku Suezawa; Tomoo Ushio; Nobuhiro Takahashi; Hiroshi Hanado; Katsuhiro Nakagawa; Masahiko Osada; Tsuyoshi Maesaka; Koyuru Iwanami; Kazuhiro Yoshimi; Fumihiko Mizutani; Masakazu Wada; Yasuhide Hobara
IEEE Transactions on Geoscience and Remote Sensing, 58, 5, 3657-3666, May 2020, Peer-reviwed
Scientific journal - Low latitude VLF radio signal disturbances due to the extremely severe cyclone Fani of May 2019 and associated mesopheric response
S. Pal; S. Sarker; S. K. Midya; S. K. Mondal; Y. Hobara
JGR. Space Physics, 125, 5, 16 Apr. 2020, Peer-reviwed
Scientific journal, English - Simultaneous Study of VLF/ULF Anomalies Associated with Earthquakes in Japan
V. Singh; Y. Hobara
Open Journal of Earthquake of Research, 9, 201-215, Mar. 2020, Peer-reviwed
Scientific journal, English - Mid-latitude and high latitude ionospheric disturbances during Sudden Stratospheric Warming events observed by VLF/LF signals
A. Sen; S. Pal; S. K. Mondal; Y. Hobara
2019 URSI Asia-Pacific Radio Science Conference, AP-RASC 2019, Institute of Electrical and Electronics Engineers Inc., 01 Mar. 2019
International conference proceedings, English - Response of the sub-ionospheric VLF/LF signals to the major SSW event of 2009
S. Pal; Y. Hobara; S. K. Chakrabarti; P. W. Schnoor
2017 32nd General Assembly and Scientific Symposium of the International Union of Radio Science, URSI GASS 2017, Institute of Electrical and Electronics Engineers Inc., 2017-, 1-4, 10 Nov. 2017
International conference proceedings, English - Multi step ahead prediction of nighttime VLF amplitude signal for low-, mid-And high-latitude paths
H. Santosa; Y. Hobara
2017 32nd General Assembly and Scientific Symposium of the International Union of Radio Science, URSI GASS 2017, Institute of Electrical and Electronics Engineers Inc., 2017-, 1-4, 10 Nov. 2017, Peer-reviwed
International conference proceedings, English - Sprites identification and their spatial distributions in JEM-GLIMS nadir observations
Mitsuteru Sato; Toru Adachi; Tomoo Ushio; Takeshi Morimoto; Masayuki Kikuchi; Hiroshi Kikuchi; Makoto Suzuki; Atsushi Yamazaki; Yukihiro Takahashi; Ryohei Ishida; Yuji Sakamoto; Kazuya Yoshida; Yasuhide Hobara
TERRESTRIAL ATMOSPHERIC AND OCEANIC SCIENCES, 28, 4, 545-561, Aug. 2017, Peer-reviwed
Scientific journal, English - Effects of the major sudden stratospheric warming event of 2009 on the subionospheric very low frequency/low frequency radio signals
S. Pal; Y. Hobara; S. K. Chakrabarti; P. W. Schnoor
JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, 122, 7, 7555-7566, Jul. 2017, Peer-reviwed
Scientific journal, English - One day prediction of nighttime VLF amplitudes using nonlinear autoregression and neural network modeling
H. Santosa; Y. Hobara
RADIO SCIENCE, 52, 1, 132-145, Jan. 2017, Peer-reviwed
Scientific journal, English - Multi-step Ahead Prediction of Midlatitude Daily Nighttime Subionospheric VLF Signals using NARX NN Modeling
H. Santosa; Y. Hobara; Y. Matsui
The IRAGO conference, *, Nov. 2016, Peer-reviwed
International conference proceedings, English - Identification of sprites in JEM-GLIMS nadir observations and their spatial distributions
M. Sato; T. Adachi; T. Ushio; T. Morimoto; M. Kikuchi; H. Kikuchi; M. Suzuki; A. Yamazaki; Y. Takahashi; R. Ishida; Y. Sakamoto; K. Yoshida; Y. Hobara
Terrestrial, Atmospheric and Oceanic Sciences (TAO), accepted 21 Sep. 2016., 21 Sep. 2016, Peer-reviwed
Scientific journal, English - An overview of VHF lightning observations by digital interferometry from ISS/JEM-GLIMS
Morimoto Takeshi; Kikuchi Hiroshi; Sato Mitsuteru; Ushio Tomoo; Yamazaki Atsushi; Suzuki Makoto; Ishida Ryohei; Sakamoto Yuji; Yoshida Kazuya; Hobara Yasuhide; Sano Takuki; Abe Takumi; Kawasaki Zen-Ichiro
EARTH PLANETS AND SPACE, 68, 15 Aug. 2016, Peer-reviwed - Horizontal distributions of sprites derived from the JEM-GLIMS nadir observations
M. Sato; M. Mihara; T. Adachi; T. Ushio; T. Morimoto; M. Kikuchi; H. Kikuchi; M. Suzuki; A. Yamazaki; Y. Takahashi; U. Inan; I. Linscott; R. Ishida; Y. Sakamoto; K. Yoshida; Y. Hobara
Journal of Geophysical Research: Atmospheres, 8 Apr 2016, DOI: 10.1002/2015JD024311., 08 Apr. 2016, Peer-reviwed
Scientific journal, English - Identifying the occurrence of lightning and transient luminous events by nadir spectrophotometric observation
T. Adachi; M. Sato; T. Ushio; A. Yamazaki; M. Suzuki; M. Kikuchi; Y. Takahashi; U. S. Inan; I. Linscottf; Y. Hobara; H. U. Frey; S. B. Mende; A. B. Chen; R. R. Hsu; K. Kusunoki
J. Atmos. Solar-Terr. Phys., 145, 85-97, Apr. 2016, Peer-reviwed
Scientific journal, English - Mid-latitude atmosphere and ionosphere connection as revealed by very low frequency signals
Sujay Pal; Yasuhide Hobara
JOURNAL OF ATMOSPHERIC AND SOLAR-TERRESTRIAL PHYSICS, 138, 227-232, Feb. 2016, Peer-reviwed
Scientific journal, English - Reliability of Dual and Triple Frequency Ionosphere-free Linear Combination of GPS for Single Point Positioning
V. Satya Srinivas; Y. Hobara
The IRAGO conference, *, 2016, Peer-reviwed
International conference proceedings, English - Overview and early results of the Global Lightning and Sprite Measurements mission
Sato, M; T. Ushio; T. Morimoto; M. Kikuchi; H. Kikuchi; T. Adachi; M. Suzuki; A. Yamazaki; Y. Takahashi; U. Inan; I. Linscott; R. Ishida; Y. Sakamoto; K. Yoshida; Y. Hobara; T. Sano; T. Abe; M. Nakamura; H. Oda; Z.-I. Kawasaki
J. Geophys. Res. - Atmos., 120, 3822-3851, May 2015, Peer-reviwed
Scientific journal, English - Unexpected Very Low Frequency (VLF) Radio Events Recorded by the Ionospheric Satellite DEMETER
M. Parrot; J. J. Berthelier; J. Blecki; J. Y. Brochot; Y. Hobara; D. Lagoutte; J. P. Lebreton; F. Nemec; T. Onishi; J. L. Pincon; D. Pisa; O. Santolik; J. A. Sauvaud; E. Slominska
SURVEYS IN GEOPHYSICS, 36, 3, 483-511, May 2015, Peer-reviwed
Scientific journal, English - Sub-ionospheric VLF signal anomaly due to geomagnetic storms: a statistical study
K. Tatsuta; Y. Hobara; S. Pal; M. Balikhin
ANNALES GEOPHYSICAE, 33, 11, 1457-1467, 2015, Peer-reviwed
Scientific journal, English - Tsunami-driven ionospheric perturbations associated with the 2011 Tohoku earthquake as detected by subionospheric VLF signals
A. Rozhnoi; M. Solovieva; M. Hayakawa; H. Yamaguchi; Y. Hobara; B. Levin; V. Fedun
GEOMATICS NATURAL HAZARDS & RISK, 5, 4, 285-292, Dec. 2014, Peer-reviwed
Scientific journal, English - On the fine structure of dipolarization fronts
M. A. Balikhin; A. Runov; S. N. Walker; M. Gedalin; I. Dandouras; Y. Hobara; A. Fazakerley
JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, 119, 8, Aug. 2014, Peer-reviwed
Scientific journal, English - Multi-Point Detection of the Elf Transient Caused by the Gamma Flare of December 27, 2004
A. P. Nickolaenko; A. Yu. Schekotov; M. Hayakawa; Y. Hobara; G. Satori; J. Bor; M. Neska
RADIOPHYSICS AND QUANTUM ELECTRONICS, 57, 2, 125-140, Jul. 2014, Peer-reviwed
Scientific journal, English - X-rays and solar proton event induced changes in the first mode Schumann resonance frequency observed at a low latitude station Agra, India
Birbal Singh; Rajesh Tyagi; Yasuhide Hobara; Masashi Hayakawa
JOURNAL OF ATMOSPHERIC AND SOLAR-TERRESTRIAL PHYSICS, 113, 113, 1-9, Jun. 2014, Peer-reviwed
Scientific journal, English - Deducing Locations and Charge Moment Changes of Lightning Discharges by ELF Network Observations in Japan
Y. Hobara; T. Inoue; M. Hayakawa; K. Shiokawa
ICAE2014, **, **, **-**, Jun. 2014, Peer-reviwed
International conference proceedings, English - Summer Thunderstorm Associated with Cluster of Blue Jets and Starters in Japan
T.Suzuki; M.Hayakawa; Y.Hobara; K.Kusunoki
ICAE 2014, **, **, **-**, Jun. 2014, Peer-reviwed
International conference proceedings, English - Detection of tsunami-driven phase and amplitude perturbations of subionospheric VLF signals following the 2010 Chile earthquake
A. Rozhnoi; S. Shalimov; M. Solovieva; B. Levin; G. Shevchenko; M. Hayakawa; Y. Hobara; S. N. Walker; V. Fedun
JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, 119, 6, 5012-5019, Jun. 2014, Peer-reviwed
Scientific journal, English - The origin of spectral resonance structures of the ionospheric Alfven resonator. Single high-altitude reflection or resonant cavity excitation?
E. Fedorov; A. Schekotov; Y. Hobara; R. Nakamura; N. Yagova; M. Hayakawa
JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, 119, 4, 3117-3129, Apr. 2014, Peer-reviwed
Scientific journal, English - Surface displacements in Japan before the 11 March 2011 M9.0 Tohoku-Oki earthquake
Chieh-Hung Chen; Strong Wen; Jann-Yenq Liu; Katsumi Hattori; Peng Han; Yasuhide Hobara; Chung-Ho Wang; Ta-Kang Yeh; Horng-Yuan Yen
JOURNAL OF ASIAN EARTH SCIENCES, 80, 165-171, Feb. 2014, Peer-reviwed
Scientific journal, English - Estimating the lower ionosphere height and lightning location using multimode "tweek" atmospherics
A. V. Shvets; T. M. Serdiuk; Y. V. Gorishnyaya; Y. Hobara; M. Hayakawa
JOURNAL OF ATMOSPHERIC AND SOLAR-TERRESTRIAL PHYSICS, 108, 1-9, Feb. 2014, Peer-reviwed
Scientific journal, English - Detection of tsunami-driven phase and amplitude perturbations of subionospheric VLF signals following the 2010 Chile earthquake
A. Rozhnoi; S. Shalimov; M. Solovieva; B. Levin; G. Shevchenko; M. Hayakawa; Y. Hobara; S. N. Walker; V. Fedun
Journal of Geophysical Research: Space Physics, Blackwell Publishing Ltd, 119, 6, 5012-5019, 2014, Peer-reviwed
Scientific journal, English - The origin of spectral resonance structures of the ionospheric Alfvén resonator. Single high-altitude reflection or resonant cavity excitation?
E. Fedorov; A. Schekotov; Y. Hobara; R. Nakamura; N. Yagova; M. Hayakawa
Journal of Geophysical Research: Space Physics, Blackwell Publishing Ltd, 119, 4, 3117-3129, 2014, Peer-reviwed
Scientific journal, English - Deducing Locations and Electrical properties of Lightning Discharges by ELF Network Observations in Japan
Yasuhide Hobara; Masashi Hayaka; Kazuo Shiokawa
2014 XXXITH URSI GENERAL ASSEMBLY AND SCIENTIFIC SYMPOSIUM (URSI GASS), 2014, Peer-reviwed
International conference proceedings, English - Spatio-temporal characteristics of sub-ionospheric perturbations associated with annular solar eclipse over Japan: Network observations and modeling
Daiki Inui; Yasuhide Hobara
2014 XXXITH URSI GENERAL ASSEMBLY AND SCIENTIFIC SYMPOSIUM (URSI GASS), 2014, Peer-reviwed
International conference proceedings, English - Simultaneous observations of ionospheric disturbances from VLF transmitter signals and surface displacements from GPS related to inland earthquakes over Japan
Yasuhde Hobara; Risa Miyake; C. -H. Chen
2014 XXXITH URSI GENERAL ASSEMBLY AND SCIENTIFIC SYMPOSIUM (URSI GASS), **, **, NH33B, 2014, Peer-reviwed
International conference proceedings, English - Global Lightning and Sprite Measurements from International Space Station
Tomoo Ushio; Mitsuteru Sato; Takeshi Morimoto; Hiroshi Kikuchi; Makoto Suzuki; Atsushi Yamazaki; Yasuhide Hobara; Toru Adachi
2014 XXXITH URSI GENERAL ASSEMBLY AND SCIENTIFIC SYMPOSIUM (URSI GASS), **, **, **-**, 2014, Peer-reviwed
International conference proceedings, English - Ground-based observations of the relations between lightning charge-moment-change and the physical and optical properties of column sprites
Roy Yaniv; Yoav Yair; Colin Price; Jo'zsef Bor; Mitsutero Sato; Yasuhide Hobara; Steve Cummer; Jingbo Li; Adam Devir
JOURNAL OF ATMOSPHERIC AND SOLAR-TERRESTRIAL PHYSICS, 107, 107, 60-67, Jan. 2014, Peer-reviwed
Scientific journal, English - Ionospheric effects of the Mt. Kirishima volcanic eruption as seen from subionospheric VLF observations
A. Rozhnoi; M. Hayakawa; M. Solovieva; Y. Hobara; V. Fedun
JOURNAL OF ATMOSPHERIC AND SOLAR-TERRESTRIAL PHYSICS, 107, 107, 54-59, Jan. 2014, Peer-reviwed
Scientific journal, English - Simultaneous study of ULF/VLF anomalies associated with earthquakes occurred in Japan” in session
Y. Hobara
AGU Fall Meeting, **, **, NH33B, Dec. 2013, Peer-reviwed
International conference proceedings, English - The dynamic quasiperpendicular shock: Cluster discoveries
V. Krasnoselskikh; M. Balikhin; S. N. Walker; S. Schwartz; D. Sundkvist; V. Lobzin; M. Gedalin; S. D. Bale; F. Mozer; J. Soucek; Y. Hobara; H. Comisel
Space Science Reviews, 178, 2-4, 535-598, Oct. 2013, Peer-reviwed
Scientific journal, English - The lower ionospheric perturbation as a precursor to the 11 March 2011 Japan earthquake
M. Hayakawa; A. Rozhnoi; M. Solovieva; Y. Hobara; K. Ohta; A. Schekotov; E. Fedorov
GEOMATICS NATURAL HAZARDS & RISK, 4, 3, 275-287, Sep. 2013, Peer-reviwed
Scientific journal, English - Surface displacements from GPS and subionospheric VLF signal perturbations related to major earthquakes over Japan
Y. Hobara; G. Suzuki; C; Chieh-Hung; M. Hayakawa
2013 Asia-Pacific radio sceinece conference, **, Sep. 2013, Peer-reviwed
International conference proceedings, English - Charge moment changes of lightning strokes deduced by ELF Network observations in Japan
Y. Hobara; T. Inoue; R. Nakamura; M. Hayakawa; K. Shiokawa
2013 Asia-Pacific radio sceinece conference, **, Sep. 2013, Peer-reviwed
International conference proceedings, English - The Ionospheric Precursor to the 2011 March 11 Earthquake Based upon Observations Obtained from the Japan-Pacific Subionospheric VLF/LF Network
Masashi Hayakawa; Yasuhide Hobara; Alexander Rozhnoi; Maria Solovieva; Kenji Ohta; Jun Izutsu; Tohru Nakamura; Yasushi Kasahara
TERRESTRIAL ATMOSPHERIC AND OCEANIC SCIENCES, 24, 3, 393-408, Jun. 2013, Peer-reviwed
Scientific journal, English - Simultaneous observations of surface displacements from GPS and ionospheric perturbations from VLF transmitter signals around major seismic events in Japan
Y. hobara; G. Suzuki; C. C. Hung; M. Hayakawa
EGU General Assembly 2013, **, Apr. 2013, Peer-reviwed
International conference proceedings, English - Nadir Observations of Lightning and TLEs by JEM-GLIMS
M. Sato; T. Ushio; T. Morimoto; M. Suzuki; A. Yamazaki; M. Kikuchi; Y. Takahashi; I. Umran; L. Ivan; Y. Hobara
EGU General Assembly 2013, --, Apr. 2013, Peer-reviwed
International conference proceedings, English - Worldwide detection of elf transient associated with the gamma flare of December 27, 2004
A. Yu Schekotov; A. P. Nickolaenko; M. Hayakawa; Y. Hobara; G. Satori; J. Bor; M. Neska
Telecommunications and Radio Engineering (English translation of Elektrosvyaz and Radiotekhnika), 72, 18, 1695-1718, 2013, Peer-reviwed
Scientific journal, English - A note on the correlation of seismo-ionospheric perturbations with ground motions as deduced from F-net seismic obsevations
T. Endo; Y. Kasahara; Y. Hobara; T. Sue; M.Hayakawa
J. Atmos. Electr., Society of Atmospheric Electricity of Japan, 33, 1, 69-76, Jan. 2013, Peer-reviwed, The purpose of this paper is to try to find any correlation between the ionospheric perturbation as detected by subionospheric VLF/LF propagation and ground motions as detected by wideband seismic observations (so-called F-net). Two huge earthquakes are chosen for our analysis; (1) Niigata-chuetsu-oki earthquake on July 16, 2007 and (2) Iwate-nairiku-nambu earthquake on June 13, 2008. The AW(acoustic wave, period=1-10 min) and AGW(atmospheric gravity wave, period=10-100 min) components in the ground motions are compared with the ionospheric perturbation. It is found that the ground motions in the AGW and AW ranges are enhanced as compared with the backgrounds when the lower ionosphere is perturbed, which might be a possible source of ionospheric perturbation. Though the number of events is only two, this correlation may lend a support to the atmospheric oscillation hypothesis of the lithosphereionosphere coupling due to some precursory ground effect.
Scientific journal, English - Ionospheric perturbations observed by the low altitude satellite DEMETER and possible relation with seismicity
Y.Hobara; R.Nakamura; M.Suzuki; M.Hayakawa; M.Parrot
J. Atmos. Electr., Society of Atmospheric Electricity of Japan, 33, 1, 21-29, 2013, Peer-reviwed, The high-altitude ionospheric perturbations around the equatorial anomalies (EA) are often observed by DEMETER spacecraft on the nighttime orbits. The ionospheric perturbations are recognized as an enhancement of the electric field in the ELF frequency range in the satellite coordinate. Clear perturbations are mostly recognized on the dayside of the satellite orbit and the peak perturbation intensity tends to increase with increasing magnetic latitude based on around 1000 perturbation events observed in the year of 2005. The perturbation intensities are examined in relation with major seismic activities. As a result, most importantly higher perturbation intensity persists for the time periods around the occurrence days of the land earthquakes rather than those for the sea earthquakes and without major earthquakes nearby. However, the difference of the observed perturbation intensity between above-mentioned three cases are rather small due to relatively large variability indicative of the weak correlation of seismicity with the high altitude ionospheric perturbations near EA.
Scientific journal, English - ULF magnetic field depression as a possible precursor to the 2011-3.11 Japan earthquake
A.Schekotov; E.Fedorov; Y.Hobara; M.Hayakawa
J. Atmos. Electr., Society of Atmospheric Electricity of Japan, 33, 1, 41-51, 2013, Peer-reviwed, The depression (reduction in amplitude) of ULF magnetic field variations of magnetospheric origin is studied at various distances from the epicenter of the strongest earthquake (EQ) which occurred in Japan on March 11, 2011. For this purpose, we have used the ULF data in Japan observed by fluxgate magnetometers at three places located at distances of ~300 km to ~1300 km from the epicenter of the main shock. The period of data analysis is from December 1, 2010 to May 31, 2011. We have found a sharp increase in depression of the horizontal ULF magnetic field component at the frequency of 0.03 - 0.05 Hz (30-50 mHz) at all of three Japanese observatories (Kakioka, Memambetsu and Kanoya) three days before the first strong foreshock (Mw=7.5) and five days before the main shock (Mw = 9). This peak in depression is found to be several times greater than all previous values, but the depression seems to be most enhanced at Kakioka, the station nearest to the EQ epicenter. So that it is likely that this phenomenon could be a possible precursor to the huge 3.11 EQ.
Scientific journal, English - An evidence on the lithosphere-ionosphere coupling in terms of atmospheric gravity waves on the basis of a combined analysis of surface pressure,ionospheric perturbations and ground-based ULF variations
T. Nakamura; V. Korepanov; Y. Kasahara; Y. Hobara; M. Hayakawa
J. Atmos. Electr., Society of Atmospheric Electricity of Japan, 33, 1, 53-68, 2013, Peer-reviwed, One major candidate of lithosphere-atmosphere-ionosphere (LAI) coupling mechanism is through atmospheric oscillations triggered near Earth's surface due to some pre-earthquake (EQ) effect, and this channel has been extensively proved by using meteorological disturbances much more easily treated than pre-EQ effects (Korepanov et al., 2009). In the present paper this channel is challengingly studied, for the first time, for pre-EQ phenomena, and we take a rather strong EQ named Niigata-chuetsu EQ on 23 October, 2004 (with magnitude of 6.8 and with depth of 13 km) for which we already know that the ionospheric perturbation did take place prior to the EQ (Hayakawa et al., 2006). In this paper the LAI coupling has been intensively studied by means of coordinated observational data (surface atmospheric pressure data as an indicator of atmospheric gravity waves (AGWs), our own subionospheric VLF/LF data as a measure of ionospheric perturbations and the ground-based ULF data as a measure to monitor the modulation in the ionospheric dynamic region). The wavelet analyses for these parameters in different spatial regions have all indicated the enhancements of fluctuations in the wave frequency of 10 ~ 100 min (in the frequency range of AGWs). The correlation of wavelet spectra between the atmospheric pressure and VLF/LF amplitude has yielded a high value with the delay of a few hours, while there is nearly no distinct delay of the wavelet spectra between the ionospheric perturbation and the ground-based ULF fluctuation. These observational facts are compared with the theoretical estimation of AGW hypothesis, which may provide a convincing support to the AGW channel of the LAI coupling.
Scientific journal, English - Observation of surface displacements from GPS analyses before and after the Jiashian earthquake (M=6.4) in Taiwan
Chieh-Hung Chen; Strong Wen; Ta-Kang Yeh; Chung-Ho Wang; Horng-Yuan Yen; Jann-Yenq Liu; Yasuhide Hobara; Peng Han
JOURNAL OF ASIAN EARTH SCIENCES, 62, 662-671, Jan. 2013, Peer-reviwed
Scientific journal, English - Deducing locations and charge moment changes of lightning discharges by ELF network observations in Japan
Yasuhide Hobara; Takahiro Inoue; Masashi Hayakawa; Kazuo Shiokawa
IEEJ Transactions on Power and Energy, 133, 12, 994-1000, 2013, Peer-reviwed
Scientific journal, English - Neural network approach to the prediction of seismic events based on low-frequency signal monitoring of the Kuril-Kamchatka and Japanese regions
Irina Popova; Alexander Rozhnoi; Maria Solovieva; Boris Levin; Masashi Hayakawa; Yasuhide Hobara; Pier Francesco Biagi; Konrad Schwingenschuh
Annals of Geophysics, INGV, 56, 3, *-*, 2013, Peer-reviwed
Scientific journal, English - Ionospheric perturbations observed by the low altitude satellite DEMETER and possible relation with seismicity
Y. Hobara; R. Nakamura; M. Suzuki; M. Hayakawa; M. Parrot
J. Atmos. Electr., Society of Atmospheric Electricity of Japan, 33, 33, 21-29, 2013, Peer-reviwed, The high-altitude ionospheric perturbations around the equatorial anomalies (EA) are often observed by DEMETER spacecraft on the nighttime orbits. The ionospheric perturbations are recognized as an enhancement of the electric field in the ELF frequency range in the satellite coordinate. Clear perturbations are mostly recognized on the dayside of the satellite orbit and the peak perturbation intensity tends to increase with increasing magnetic latitude based on around 1000 perturbation events observed in the year of 2005. The perturbation intensities are examined in relation with major seismic activities. As a result, most importantly higher perturbation intensity persists for the time periods around the occurrence days of the land earthquakes rather than those for the sea earthquakes and without major earthquakes nearby. However, the difference of the observed perturbation intensity between above-mentioned three cases are rather small due to relatively large variability indicative of the weak correlation of seismicity with the high altitude ionospheric perturbations near EA.
Scientific journal, English - ULF magnetic field depression as a possible precursor to the 2011/3.11 Japan earthquake
A. Schekotov; E. Fedorov; Y. Hobara; M. Hayakawa
J. Atmos. Electr., Society of Atmospheric Electricity of Japan, 33, 1, 41-51, 2013, Peer-reviwed, The depression (reduction in amplitude) of ULF magnetic field variations of magnetospheric origin is studied at various distances from the epicenter of the strongest earthquake (EQ) which occurred in Japan on March 11, 2011. For this purpose, we have used the ULF data in Japan observed by fluxgate magnetometers at three places located at distances of ~300 km to ~1300 km from the epicenter of the main shock. The period of data analysis is from December 1, 2010 to May 31, 2011. We have found a sharp increase in depression of the horizontal ULF magnetic field component at the frequency of 0.03 - 0.05 Hz (30-50 mHz) at all of three Japanese observatories (Kakioka, Memambetsu and Kanoya) three days before the first strong foreshock (Mw=7.5) and five days before the main shock (Mw = 9). This peak in depression is found to be several times greater than all previous values, but the depression seems to be most enhanced at Kakioka, the station nearest to the EQ epicenter. So that it is likely that this phenomenon could be a possible precursor to the huge 3.11 EQ.
Scientific journal, English - The observation of Doppler shifts of subionospheric LF signal in possible association with earthquakes
M. Hayakawa; Y. Kasahara; T. Endoh; Y. Hobara; S. Asai
JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, 117, Sep. 2012, Peer-reviwed
Scientific journal, English - First detection of summer blue jets and starters over Northern Kanto area of Japan: Lightning activity
Tomoyuki Suzuki; Masashi Hayakawa; Yasuhide Hobara; Kenichi Kusunoki
JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, 117, A7, Jul. 2012, Peer-reviwed
Scientific journal, English - A statistical study of the cross-shock electric potential at low Mach number, quasi-perpendicular bow shock crossings using Cluster data
A. P. Dimmock; M. A. Balikhin; V. V. Krasnoselskikh; S. N. Walker; S. D. Bale; Y. Hobara
JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, 117, Feb. 2012, Peer-reviwed
Scientific journal, English - Lightning effects in the mesosphere and ionosphere
M. Hayakawa; Y. Hobara; T. Suzuki
Lightning Electromagnetics, Institution of Engineering and Technology, 611-646, 01 Jan. 2012, Peer-reviwed
In book, English - The effects of lightning on the ionosphere/magnetosphere
Y. Hobara; M. Hayakawa
Lightning Electromagnetics, Institution of Engineering and Technology, 647-685, 01 Jan. 2012, Peer-reviwed
In book, English - The ionospheric precursor to the 2011 march 11 earthquake as based on the japan-pacific subionospheric VLF/LF network observation
M. Hayakawa; Y. Hobara; A. Rozhnoi; M. Solovieva; K. Ohta; J. Izutsu; T. Nakamura; Y. Yasuda; H. Yamaguchi; Y. Kasahara
Telecommunications and Radio Engineering (English translation of Elektrosvyaz and Radiotekhnika), 71, 18, 1687-1706, 2012, Peer-reviwed
Scientific journal, English - ULF magnetic field depression as a possible precursor to the 2011/3.11 Japan earthquake
A. Schekotov; E. Fedorov; Y. Hobara; M. Hayakawa
Telecommunications and Radio Engineering (English translation of Elektrosvyaz and Radiotekhnika), 71, 18, 1707-1718, 2012, Peer-reviwed
Scientific journal, English - The observation of Doppler shifts of subionospheric LF signal in possible association with earthquakes
M. Hayakawa; Y. Kasahara; T. Endoh; Y. Hobara; S. Asai
Journal of Geophysical Research: Space Physics, Blackwell Publishing Ltd, 117, 9, 2012, Peer-reviwed
Scientific journal, English - A statistical study of the cross-shock electric potential at low Mach number, quasi-perpendicular bow shock crossings using Cluster data
A. P. Dimmock; M. A. Balikhin; V. V. Krasnoselskikh; S. N. Walker; S. D. Bale; Y. Hobara
Journal of Geophysical Research: Space Physics, Blackwell Publishing Ltd, 117, 2, 2012, Peer-reviwed
Scientific journal, English - Possible precursor to the March 11, 2011, Japan earthquake: ionospheric perturbations as seen by subionospheric very low frequency/low frequency propagation
Masashi Hayakawa; Yasuhide Hobara; Yoshihiro Yasuda; Hiroki Yamaguchi; Kenji Ohta; Jun Izutsu; Tohru Nakamura
ANNALS OF GEOPHYSICS, 55, 1, 95-99, 2012, Peer-reviwed
Scientific journal, English - The effect of a gamma ray flare on Schumann resonances
A. P. Nickolaenko; I. G. Kudintseva; O. Pechony; M. Hayakawa; Y. Hobara; Y. T. Tanaka
ANNALES GEOPHYSICAE, 30, 9, 1321-1329, 2012, Peer-reviwed
Scientific journal, English - Ionospheric perturbations associated with two huge earthquakes in Japan, using principal component analysis for multiple subionospheric VLF/LF propagation paths
Yuya Ono; Yuichi Ida; Yasushi Kasahara; Yasuhide Hobara; Masashi Hayakawa; Alexander Rozhnoi; Maria Solovieva; Oleg A. Molchanov; Kenji Ohta
ANNALS OF GEOPHYSICS, 55, 1, 138-147, 2012, Peer-reviwed
Scientific journal, English - The Global Lightning and Sprite Measurement (GLIMS) Mission of the International Space Station - Concept and Overview -
Ushio, T; M. Sato; T. Morimoto; M. Suzuki; H. Kikuchi; A. Yamazaki; Y. Takahashi; Y. Hobara; U. Inan; I. Linscott; Y. Sakamoto; R. Ishida; M. Kikuchi; K. Yoshida; Z. Kawasaki
IEEJ Transactions on Fundamentals and Materials, 131, 12, 971-976, Dec. 2011, Peer-reviwed
Scientific journal, English - Ionospheric perturbations associated with the 2011 3.11 EQ, as seen from the subionospheric VLF/LF network
M.Hayakawa; Y. Hobara; A. Rozhnoi; M. Solovieva
Americal Geophysical Union Fall Meeting, NH22A-05, Dec. 2011, Peer-reviwed
International conference proceedings, English - VLF subionospheric disturbances associated with earthquakes: Observations and numerical modeling
Y. Hobara; M. Iwamoto; K. Ohta; M. Hayakawa
Americal Geophysical Union Fall Meeting, NH23A-1550, Dec. 2011, Peer-reviwed
International conference proceedings, English - Universal and local time variations deduced from simultaneous Schumann resonance records at three widely separated observatories
A. P. Nickolaenko; E. I. Yatsevich; A. V. Shvets; M. Hayakawa; Y. Hobara
RADIO SCIENCE, 46, RS5003, Sep. 2011, Peer-reviwed
Scientific journal, English - Ionospheric transmission property deduced from lowaltitude satellite and ground-based observations of lightning ELF waves
Y. Hobara; M. Parrot
International Conference on Atmospheric Electricity 2011, -, Aug. 2011, Peer-reviwed
International conference proceedings, English - Ground-based measurement of the seismo-electromagnetic signals
Y. Hobara; M. Hayakawa
URSI General Assembly and Scientific Symposium of International Union of Radio Science, -, Aug. 2011, Peer-reviwed
International conference proceedings, English - SCHUMANN-RESONANCE RECORDS AT THREE OBSERVATORIES AND ULF UNIVERSAL- AND LOCAL-TIME VARIATIONS
A. P. Nickolaenko; E. I. Yatsevich; A. V. Shvets; M. Hayakawa; Y. Hobara
RADIOPHYSICS AND QUANTUM ELECTRONICS, 53, 12, 706-716, May 2011, Peer-reviwed
Scientific journal, English - Observation of Doppler shifts of subionospheric VLF/LF signals and the seismic effect
M. Hayakawa; Y. Kasahara; T. Nakamura; Y. Hobara; S. Asai; T. Inaba
European Geosciences Union, -, Apr. 2011, Peer-reviwed
International conference proceedings, English - Statistical property of the ULF magnetic emissions in relation with Izu Island earthquake swarm in Japan
Y. Hobara; T. Kamoi; M. Hayakawa
European Geosciences Union, -, Apr. 2011, Peer-reviwed
International conference proceedings, English - Detection of transient ELF emission caused by the extremely intense cosmic gamma-ray flare of 27 December 2004
Y. T. Tanaka; M. Hayakawa; Y. Hobara; A. P. Nickolaenko; K. Yamashita; M. Sato; Y. Takahashi; T. Terasawa; T. Takahashi
GEOPHYSICAL RESEARCH LETTERS, 38, L08805, Apr. 2011, Peer-reviwed
Scientific journal, English - Measurement of Doppler shifts of short-distance subionospheric LF transmitter signals and seismic effects
S. Asai; S. Yamamoto; Y. Kasahara; Y. Hobara; T. Inaba; M. Hayakawa
JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, 116, A2, Feb. 2011, Peer-reviwed
Scientific journal, English - IMPACT OF A GAMMA-RAY BURST ON THE SCHUMANN RESONANCE
A. P. Nickolaenko; I. G. Kudintseva; O. Pechonaya; M. Hayakawa; T. Nakamura; Ya. Hobara; Ya. Tanaka
RADIOPHYSICS AND QUANTUM ELECTRONICS, 53, 9-10, 542-556, Feb. 2011, Peer-reviwed
Scientific journal, English - Recent studies of Schumann resonance and ELF transients
M. Hayakawa; A. P. Nickolaenko; A. V. Shvets; Y. Hobara
Lightning: Properties, Formation and Types, Nova Science Publishers, Inc., 43-75, 2011
In book, English - Fractal analysis of electromagnetic emissions in possible association with earthquakes
M. Hayakawa; N. Yonaiguchi; Y. Ida; S. Masuda; Y. Hobara
Classification and Application of Fractals, Nova Science Publishers, Inc., 83-102, 2011
In book, English - Measurement of Doppler shifts of short-distance subionospheric LF transmitter signals and seismic effects
S. Asai; S. Yamamoto; Y. Kasahara; Y. Hobara; T. Inaba; M. Hayakawa
Journal of Geophysical Research: Space Physics, Blackwell Publishing Ltd, 116, 2, 2011, Peer-reviwed
Scientific journal, English - Comparison of three methods for the estimation of cross-shock electric potential using Cluster data
A. P. Dimmock; M. A. Balikhin; Y. Hobara
ANNALES GEOPHYSICAE, 29, 5, 815-822, 2011, Peer-reviwed
Scientific journal, English - Determination of the ionospheric transmission loss of the low frequency EM waves by simultaneous measurements of satellite and ground-based experiments
Y. Hobara; M. Parrot
2011 30th URSI General Assembly and Scientific Symposium, URSIGASS 2011, -, 2011, Peer-reviwed
International conference proceedings, English - TLE producing ionospheric disturbances: Observation and numerical modeling
Y. Hobara; M. Iwamoto; K. Ohta; T. Otsuyama; M. Hayakawa
2011 30th URSI General Assembly and Scientific Symposium, URSIGASS 2011, -, 2011, Peer-reviwed
International conference proceedings, English - Statistical analysis of the ULF magnetic field data during earthquake swarm
Y. Hobara; T. Kamoi; M. Hayakawa
2011 30th URSI General Assembly and Scientific Symposium, URSIGASS 2011, -, 2011, Peer-reviwed
International conference proceedings, English - Ionospheric perturbations in possible association with the 2010 Haiti earthquake, as based on medium-distance subionospheric VLF propagation data
M. Hayakawa; J. P. Raulin; Y. Kasahara; F. C. P. Bertoni; Y. Hobara; W. Guevara-Day
NATURAL HAZARDS AND EARTH SYSTEM SCIENCES, 11, 2, 513-518, 2011, Peer-reviwed
Scientific journal, English - Recent studies of Schumann resonance and ELF transients, in “Lightning: Properties, Formation and Types
M. Hayakawa; A. P. Nickolaenko; A. V. Shvets; Y. Hobara
Ed. by M. D. Wood, Nova Sci. Pub., 39-71, 2011, Peer-reviwed
Scientific journal, English - A study on global temperature and thunderstorm activity by using the data of Schumann resonance observed at Nakatsugawa, Japan
Y. Hobara; T. Harada; K. Ohta; M. Sekiguchi; M. Hayakawa
J. Atmos. Electr., 31, 2, 111-119, 2011, Peer-reviwed
Scientific journal, English - Atmospheric gravity waves as a possible candidate for seismo-ionospheric perturbations
M. Hayakawa; Y. Kasahara; T. Nakamura; Y. Hobara; A. Rozhnoi; M. Solovieva; O. A. Molchanov; V. Korepanov
J. Atmos. Electr., 31, 2, 129-140, 2011, Peer-reviwed
Scientific journal, English - Seismogenic effects in the ELF Schumann resonance band
Masashi Hayakawa; Yasuhide Hobara; Kenji Ohta; Jun Izutsu; Alexander P. Nickolaenko; Valery Sorokin
IEEJ Transactions on Fundamentals and Materials, 131, 9, 684-690, 2011, Peer-reviwed
Scientific journal, English - The ultra-low-frequency magnetic disturbances associated with earthquakes
M. Hayakawa; Y. Hobara; K. Ohta; K. Hattori
Earthquake Science, 24, 6, 523-534, 2011, Peer-reviwed
Scientific journal, English - On the correlation between ionospheric perturbations as detected by subionospheric VLF/LF signals and earthquakes as defined by seismic intensity
M. Hayakawaa; Y. Kasaharaa; T. Nakamuraa; Y. Hobarab; A.Rozhnoic; M. Solovievad; O.A. Molchanov
American Geophysical Union Fall Meeting, -, Dec. 2010, Peer-reviwed
International conference proceedings, English - Variations of the global lightning distribution revealed from three-station Schumann resonance measurements
A. V. Shvets; Y. Hobara; M. Hayakawa
JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, 115, Dec. 2010, Peer-reviwed
Scientific journal, English - Statistical study of the quasi-perpendicular shock ramp widths
Y. Hobara; M. Balikhin; V. Krasnoselskikh; M. Gedalin; H. Yamagishi
JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, 115, A11, Nov. 2010, Peer-reviwed
Scientific journal, English - Statistical study of the ionospheric turbulence linked to energetic seismic activities observed by DEMETER
Y. Hobara; M. Suzuki; M Hayakawa; M. Parrot
IWSE-AS 2010, -, Nov. 2010, Peer-reviwed
International conference proceedings, English - Interpretation in terms of gyrotropic waves of Schumann-resonance-like line emissions observed at Nakatsugawa in possible association with nearby Japanese earthquakes
M. Hayakawa; K. Ohta; V. M. Sorokin; A. K. Yaschenko; J. Izutsu; Y. Hobara; A. P. Nickolaenko
JOURNAL OF ATMOSPHERIC AND SOLAR-TERRESTRIAL PHYSICS, 72, 17, 1292-1298, Nov. 2010, Peer-reviwed
Scientific journal, English - FIRST VERY LOW FREQUENCY DETECTION OF SHORT REPEATED BURSTS FROM MAGNETAR SGR J1550-5418
Y. T. Tanaka; Jean-Pierre Raulin; Fernando C. P. Bertoni; P. R. Fagundes; J. Chau; N. J. Schuch; M. Hayakawa; Y. Hobara; T. Terasawa; T. Takahashi
ASTROPHYSICAL JOURNAL LETTERS, 721, 1, L24-L27, Sep. 2010, Peer-reviwed
Scientific journal, English - A statistical study on the correlation between lower ionospheric perturbations as seen by subionospheric VLF/LF propagation and earthquakes
M. Hayakawa; Y. Kasahara; T. Nakamura; F. Muto; T. Horie; S. Maekawa; Y. Hobara; A. A. Rozhnoi; M. Solovieva; O. A. Molchanov
JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, 115, A9, Sep. 2010, Peer-reviwed
Scientific journal, English - Characteristics of the low frequency EM waves in the ionosphere by simultaneous measurements of DEMETER satellite and ground-based experiment
Y. Hobara; S. Watahiki; M. Hayakawa; M. Parrot
Asia-Pacific Radio Science Conference, -, Sep. 2010, Peer-reviwed
International conference proceedings, English - On the correlation between ionospheric perturbations as detected by subionospheric VLF/LF signals and earthquakes as characterized by seismic intensity
M. Hayakawa; Y. Kasahara; T. Nakamura; Y. Hobara; A. Rozhnoi; M. Solovieva; O. A. Molchanov
JOURNAL OF ATMOSPHERIC AND SOLAR-TERRESTRIAL PHYSICS, 72, 13, 982-987, Aug. 2010, Peer-reviwed
Scientific journal, English - Q-Bursts: Natural ELF Radio Transients
A. P. Nickolaenko; M. Hayakawa; Y. Hobara
SURVEYS IN GEOPHYSICS, 31, 4, 409-425, Jul. 2010, Peer-reviwed
Scientific journal, English - A comparison of different source location methods for ELF transients by using the parent lightning discharges with known positions
T. Nakamura; M. Sekiguchi; Y. Hobara; M. Hayakawa
JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, 115, Jun. 2010, Peer-reviwed
Scientific journal, English - Ionospheric turbulence associated with energetic earthquakes observed by a low-altitude satellite
Y. Hobara; M. Suzuki; M. Hayakawa; M. Parrot
2010 Western Pacific Geophysics Meeting, -, Jun. 2010, Peer-reviwed
International conference proceedings, English - Statistical study of the ionospheric turbulence linked to energetic seismic activities observed by a low-altitude satellite
Y. Hobara; M. Suzuki; M. Hayakawa; M. Parrot
EGU General Assembly, -, May 2010
International conference proceedings, English - Reception of ELF transmitter signals at Moshiri, Japan, and their propagation characteristics
M. Yano; Y. Ida; Y. Hobara; M. Hayakawa; A. P. Nickolaenko
RADIO SCIENCE, 45, RS1009, doi: 10, 1029/2009RS004224, Feb. 2010, Peer-reviwed
Scientific journal, English - Variations of the global lightning distribution revealed from three-station Schumann resonance measurements
A. V. Shvets; Y. Hobara; M. Hayakawa
Journal of Geophysical Research: Space Physics, Blackwell Publishing Ltd, 115, 12, 2010, Peer-reviwed
Scientific journal, English - Statistical study of the quasi-perpendicular shock ramp widths
Y. Hobara; M. Balikhin; V. Krasnoselskikh; M. Gedalin; H. Yamagishi
Journal of Geophysical Research: Space Physics, Blackwell Publishing Ltd, 115, 11, 2010, Peer-reviwed
Scientific journal, English - VLF subionospheric disturbances and ELF transients associated with TLEs: observations and modelling
Y. Hobara; M. Hayakawa; H. Fujii; K. Ohta
PROPAGATION EFFECTS OF VERY LOW FREQUENCY RADIO WAVES, 1286, 158-+, 2010, Peer-reviwed
International conference proceedings, English - VLF subionospheric disturbances and ELF transients associated with TLEs: observations and modelling
Y. Hobara; M. Hayakawa; H. Fujii; K. Ohta
PROPAGATION EFFECTS OF VERY LOW FREQUENCY RADIO WAVES, 1286, 158, 158-+, 2010, Peer-reviwed
International conference proceedings, English - Acomparison of different source location methods forELFtransients by using the parent lightning discharges with known positions
T. Nakamura; M. Sekiguchi; Y. Hobara; M. Hayakawa
Journal of Geophysical Research: Space Physics, Blackwell Publishing Ltd, 115, 6, -, 2010, Peer-reviwed
Scientific journal, English - Ground-based detection of sprites and their parent lightning flashes over Africa during the 2006 AMMA campaign
E. R. Williams; W. A. Lyons; Y. Hobara; V. C. Mushtak; N. Asencio; R. Boldi; J. Bor; S. A. Cummer; E. Greenberg; M. Hayakawa; R. H. Holzworth; V. Kotroni; J. Li; C. Morales; T. E. Nelson; C. Price; B. Russell; M. Sato; G. Satori; K. Shirahata; Y. Takahashi; K. Yamashita
QUARTERLY JOURNAL OF THE ROYAL METEOROLOGICAL SOCIETY, 136, 257-271, Jan. 2010, Peer-reviwed
Scientific journal, English - Subionospheric VLF/LF Probing of Ionospheric Perturbations Associated with Earthquakes: A Possibility of Earthquake Prediction.
M. Hayakawa; T. Horie; F. Muto. Y; Kasahara; K. Ohta; J. Y. Liu; Y. Hobara
SICE JCMSI, The Society of Instrument and Control Engineers, 3, 1, 10-14, 2010, Peer-reviwed, The VLF (Very Low Frequency) / LF (Low Frequency) receiving network has been established in Japan, which is composed of seven observing stations (Moshiri (Hokkaido), Chofu (Tokyo, UEC, University of Electro-Communications), Tateyama (Chiba), Shimizu (Shizuoka), Kasugai (Aichi), Maizuru (Kyoto) and Kochi (Kochi)), and three additional foreign stations have been established in Kamchatka, Taiwan and Indonesia. At each station we observe simultaneously several VLF/LF transmitter signals (two Japanese transmitters with call signals fo JJY (Fukushima), JJI (Miyazaki)), and foreign VLF transmitters (NWC (Western Australia, Australia), NPM (Hawaii, USA), NLK (Washington, USA)). This Japanese VLF/LF network is used to study the ionospheric perturbations associated with earthquakes, and we present two recent results; (1) a statistical result on the correlation between VLF/LF propagation anomalies and earthquakes, and (2) the latest results during the last six months on the two particular propagation paths; JJY-Moshiri and JJY-Taiwan. Then, we discuss the correlation of ionospheric perturbations with earthquakes in the sense of a possibility of earthquake prediction by means of VLF propagation anomalies.
Scientific journal, English - The ionospheric perturbations associated with Asian earthquakes as seen from the subionospheric propagation from NWC to Japanese stations
Y. Kasahara; F. Muto; Y. Hobara; M. Hayakawa
NATURAL HAZARDS AND EARTH SYSTEM SCIENCES, 10, 3, 581-588, 2010, Peer-reviwed
Scientific journal, English - Fractal analysis of subionospheric LF propagation data and consideration of the lithosphere-atmosphere-ionosphere coupling
T. Imamura; Y. Ida; Y. Kasahara; T. Nakamura; Y. Hobara; M. Hayakawa
NATURAL HAZARDS AND EARTH SYSTEM SCIENCES, 10, 4, 901-906, 2010, Peer-reviwed
Scientific journal, English - Current status of seismo-electromagnetics for short-term earthquake prediction
Masashi Hayakawa; Yasuhide Hobara
GEOMATICS NATURAL HAZARDS & RISK, 1, 2, 115-155, 2010, Peer-reviwed
Scientific journal, English - A statistical study on the AGW modulations in subionospheric VLF/LF propagation data and consideration of the generation mechanism of seismo-ionospheric perturbations
Y. Kasahara; T. Nakamura; Y. Hobara; M. Hayakawa; A. Rozhnoi; M. Solovieva; O.A. Molchanov
J. Atmos. Electr., Society of Atmospheric Electricity of Japan, 30, 2, 103-112, 2010, Peer-reviwed, Though there have been several papers suggesting the important role of atmospheric gravity waves (AGWs) in the generation mechanism of seismo-ionospheric perturbations, no reports have appeared on the statistical study of the AGW effect. Based on the data over nine years and for many propagation paths in and around Japan, this paper presents the first statistical result on the role of AGW in seismo-ionospheric effects. The conclusion by means of superimposed epoch analysis is that the AGW modulation (fluctuation) is rather enhanced about 10 days only for shallow (depth ‹ 40km) earthquakes, but its significance level is just close to the conventional 2σ (σ : standard deviation) level. So that, we can conceive that the AGW channel is the most dominant hypothesis for seismo- ionospheric perturbations, but an alternative channel such as chemical (+ electric field) channel is also operative either simultaneously for an EQ or may be dominant for a small number of earthquakes.
Scientific journal, English - 地球周辺での電磁ノイズの計測と地球環境の監視
早川正士; 芳原容英
電子情報通信学会 論文誌B, 93-B, 11, 1495-1503, 2010, Peer-reviwed
Scientific journal, Japanese - A statistical study on the correlation between lower ionospheric perturbations as seen by subionospheric VLF/LF propagation and earthquakes
M. Hayakawa; Y. Kasahara; T. Nakamura; F. Muto; T. Horie; S. Maekawa; Y. Hobara; A. A. Rozhnoi; M. Solovieva; O. A. Molchanov
Journal of Geophysical Research: Space Physics, Blackwell Publishing Ltd, 115, 9, -, 2010, Peer-reviwed
Scientific journal, English - A study of the morphology of winter sprites in the Hokuriku area of Japan in relation to cloud charge height
K. Myokei; Y. Matsudo; T. Asano; T. Suzuki; Y. Hobara; K. Michimoto; M. Hayakawa
JOURNAL OF ATMOSPHERIC AND SOLAR-TERRESTRIAL PHYSICS, 71, 5, 597-602, Apr. 2009, Peer-reviwed
Scientific journal, English - Thunderstorm characteristics deduced from fractal analysis and Q-bursts
Y. Hobara; K. Shirahata; M. Hayakawa; E. Williams; G. Satori; C. Price
TriSAI 2009 - Proceedings of Triangle Symposium on Advanced ICT 2009, 67-72, 2009
International conference proceedings, English - Lower ionospheric perturbations as seen by subionospheric VLF/LF propagation, in possible association with earthquakes: A statistical study
Y. Kasahara; M. Hayakawa; T. Nakamura; F. Muto; T. Horie; S. Maekawa; Y. Hobara; A. A. Rozhnoi; M. Solovievai; O. A. Molchanov
TriSAI 2009 - Proceedings of Triangle Symposium on Advanced ICT 2009, 48-53, 2009
International conference proceedings, English - Further study on the role of atmospheric gravity waves on the seismo-ionospheric perturbations as detected by subionospheric VLF/LF propagation
F. Muto; Y. Kasahara; Y. Hobara; M. Hayakawa; A. Rozhnoi; M. Solovieva; O. A. Molchanov
NATURAL HAZARDS AND EARTH SYSTEM SCIENCES, 9, 4, 1111-1118, 2009, Peer-reviwed
Scientific journal, English - Morphology of winter sprites in the Hokuriku area of Japan: Monthly variation and dependence on air temperature
K. Myokei; Y. Matsudo; T. Asano; M. Sekiguchi; T. Suzuki; Y. Hobara; M. Hayakawa
J. Atmos. Electr., 29, 1, 23-34, 2009, Peer-reviwed
Scientific journal, English - Sprites over Africa during the AMMA with Multiple Electromagnetic Detections of Their Parent Lightning Flashes
Y. Hobara; K. Shirahata; E. Williams; V. Mushtak; W. Lyons; the AMMA ELF Team
EGU General Assembly, -, 2009, Peer-reviwed
International conference proceedings, English - Simultaneous measurements of lightning-generated ELF waves by low-altitude satellite and ground-based experiment
Y. Hobara; T. Uchida; T. Nakamura; M. Hayakawa; M. Parrot
EGU General Assembly, -, 2009, Peer-reviwed
International conference proceedings, English - Global distribution and characteristics of intense lightning discharges as deduced from ELF transients observed at Moshiri (Japan)
K. Yamashita; T. Otsuyama; Y. Hobara; M. Sekiguchi; Y. Matsudo; M. Hayakawa; V. Korepanov
J. Atmos. Electr., 29, 71-80, 2009, Peer-reviwed
Scientific journal, English - Comparison of the variations in the intensity of global electromagnetic resonance and ground surface temperature
A. P. Nickolaenko; M. Hayakawa; M. Sekiguchi; Y. Hobara
RADIOPHYSICS AND QUANTUM ELECTRONICS, 51, 12, 931-945, Dec. 2008, Peer-reviwed
Scientific journal, English - Cluster observations of electrostatic solitary waves near the Earth's bow shock
Y. Hobara; S. N. Walker; M. Balikhin; O. A. Pokhotelov; M. Gedalin; V. Krasnoselskikh; M. Hayakawa; M. Andre; M. Dunlop; H. Reme; A. Fazakerley
JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, 113, A5, May 2008, Peer-reviwed
Scientific journal, English - Nonlinear dynamics of foreshock structures: Application of nonlinear autoregressive moving average with exogenous inputs model to Cluster data
D. Zhu; M. A. Balikhin; M. Gedalin; H. Alleyne; S. A. Billings; Y. Hobara; V. Krasnosel'skikh; M. W. Dunlop; M. Ruderman
JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, 113, A4, Apr. 2008, Peer-reviwed
Scientific journal, English - Lower hybrid waves at the shock front: a reassessment
S. N. Walker; M. A. Balikhin; H. St. C. K. Alleyne; Y. Hobara; M. Andre; M. W. Dunlop
ANNALES GEOPHYSICAE, 26, 3, 699-707, 2008, Peer-reviwed
Scientific journal, English - Optical and radio probing of lightning-associated phenomena in the atmosphere and ionosphere
T. Asano; Y. Matsudo; T. Suzuki; Y. Hobara; M. Hayakawa
2008 PROCEEDINGS OF SICE ANNUAL CONFERENCE, VOLS 1-7, 1604-+, 2008, Peer-reviwed
International conference proceedings, English - Diurnal and seasonal variations in the Schumann resonance parameters at Moshiri
M. Sekiguchi; Y. Hobara; M. Hayakawa
J. Atmos. Electr., 28, 1, 1-10, 2008, Peer-reviwed
Scientific journal, English - Mode identification of terrestrial ULF waves observed by Cluster: A case study
Y. Hobara; S. N. Walker; M. Dunlop; M. Balikhin; O. A. Pokhotelov; H. Nilsson; H. Reme
PLANETARY AND SPACE SCIENCE, 55, 15, 2257-2260, Dec. 2007, Peer-reviwed
Scientific journal, English - Characteristics of terrestrial foreshock ULF waves: Cluster observations
Y. Hobara; S. N. Walker; M. Balikhin; O. A. Pokhotelov; M. Dunlop; H. Nilsson; H. Reme
JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, 112, A7, Jul. 2007, Peer-reviwed
Scientific journal, English - Cluster observations of electrostatic solitary waves near the Earth’s bow shock
Y. Hobara; S. N. Walker; M. Balikhin; O. A. Pokhotelov; M. Andre; M. Dunlop; H. Reme
General Assembly of European Geophysical Union, -, 2007, Peer-reviwed
International conference proceedings, English - Mesoscale lightning in West African squall lines and its global detection with ELF measurements
Y. Hobara; E. Williams; R. Boldi; G. Satori; J. Bor; W. Lyons; T. Nelson; M. Hayakawa; N. Nathou; B. Russell
General Assembly of European Geophysical Union, -, 2007, Peer-reviwed
International conference proceedings, English - Cluster observations of scales in the quasi-perpendicular collisionless shocks
H. Alleyne; Y. Hobara; M. Balikhin; S. Walker; O. Pokhotelov; M. Dunlop; H. Reme
American Geophysical Union Fall Meeting, -, 2007, Peer-reviwed
International conference proceedings, English - ELF Q-bursts from African squall lines
Y. Hobara; E. Williams; V. Mushtak; R. Boldi; M. Hayakawa; K. Yamashita; W. Lyons; B. Russell; G. Satori; J. Bor; C. Price; E. Greenberg; R. Holzworth
American Geophysical Union Fall Meeting, -, 2007, Peer-reviwed
International conference proceedings, English - Electrostatic solitary waves in the vicinity of the terrestrial bow shock
Y. Hobara; S. Walker; M. Balikhin; M. Gedalin; V. Krasnoselskikh; M. Hayakawa; M. Andre; M. Dunlop; H. Reme; A. Fazakerley
American Geophysical Union Fall Meeting, -, 2007, Peer-reviwed
International conference proceedings, English - Lightning flashes conducive to the production and escape of gamma radiation to space
Earle Williams; R. Boldi; J. Bór; G. Sátori; C. Price; E. Greenberg; Y. Takahashi; K. Yamamoto; Y. Matsudo; Y. Hobara; M. Hayakawa; T. Chronis; E. Anagnostou; D. M. Smith; L. Lopez
Journal of Geophysical Research Atmospheres, Blackwell Publishing Ltd, 111, 16, 27 Aug. 2006, Peer-reviwed
Scientific journal, English - Lightning flashes conducive to the production and escape of gamma radiation to space
E. Williams; R. Boldi; J. Bor; G. Satori; C. Price; E. Greenberg; Y. Takahashi; K. Yamamoto; Y. Matsudo; Y. Hobara; M. Hayakawa; T. Chronis; E. Anagnostou; D. M. Smith; L. Lopez
JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, 111, D16, Aug. 2006, Peer-reviwed
Scientific journal, English - Sprite-attributed infrasonic chirps - their detection, occurrence and properties between 1994 and 2004
Ludwik Liszka; Yasuhide Hobara
JOURNAL OF ATMOSPHERIC AND SOLAR-TERRESTRIAL PHYSICS, 68, 11, 1179-1188, Jul. 2006, Peer-reviwed
Scientific journal, English - The DEMETER Science Mission Centre
D Lagoutte; JY Brochot; D de Carvalho; F Elie; F Harivelo; Y Hobara; L Madrias; M Parrot; JL Pincon; JJ Berthelier; D Peschard; E Seran; M Gangloff; JA Sauvaud; JP Lebreton; S Stverak; P Travnicek; J Grygorczukf; J Slominski; R Wronowski; S Barbier; P Bernard; A Gaboriaud; JM Wallut
PLANETARY AND SPACE SCIENCE, 54, 5, 428-440, Apr. 2006, Peer-reviwed
Scientific journal, English - Location and electrical properties of sprite-producing lightning from a single elf site
Yasuhide Hobara; M. Hayakawa; E. Williams; R. Boldi; E. Downes
SPRITES, ELVES AND INTENSE LIGHTNING DISCHARGES, 225, 211-+, 2006, Peer-reviwed
International conference proceedings, English - Characteristics of the sprite parent winter thundercloud with positive single flash in Hokuriku, Japan (a case study on 14th December 2001)
Tomoyuki Suzuki; Masashi Hayakawa; Yasuhide Hobara; Koichiro Michimoto; Takashi Hanada
IEEJ Transactions on Fundamentals and Materials, 126, 2, 78-83, 2006, Peer-reviwed
Scientific journal, English - Evidence on a link between the intensity of Schumann resonance and global surface temperature
M. Sekiguchi; M. Hayakawa; A. P. Nickolaenko; Y. Hobara
ANNALES GEOPHYSICAE, 24, 7, 1809-1817, 2006, Peer-reviwed
Scientific journal, English - Intensity of Schumann resonance oscillations and the ground surface temperature
M. Hayakawa; M. Sekiguchi; Y. Hobara; A. P. Nickolaenko
J. Atmos. Electr., 26, 79-93, 2006, Peer-reviwed
Scientific journal, English - Mode identification of terrestrial foreshock ULF waves observaed by Cluster
Y. Hobara; S. N. Walker; M. Balikhin; M. Dunlop; O. A. Pokhotelov; H. Nilsson; H. Reme
Dynamical Process in Space Plasmas, -, 2006, Peer-reviwed
International conference proceedings, English - Characteristics of high altitude oxygen ion energization and outflow as observed by Cluster: a statistical study
H. Nilsson; M. Waara; S. Arvelius; O. Marghitu; M. Bouhram; Y. Hobara; M. Yamauchi; R. Lundin; H. Reme; J. -A. Sauvaud; I. Dandouras; A. Balogh; L. M. Kistler; B. Klecker; C. W. Carlson; M. B. Bavassano-Cattaneo; A. Korth
ANNALES GEOPHYSICAE, 24, 3, 1099-1112, 2006, Peer-reviwed
Scientific journal, English - Ionospheric perturbations linked to a very powerful seismic event
Y Hobara; M Parrot
JOURNAL OF ATMOSPHERIC AND SOLAR-TERRESTRIAL PHYSICS, 67, 7, 677-685, May 2005, Peer-reviwed
Scientific journal, English - Cluster observations and theoretical identification of broadband waves in the auroral region
M Backrud-Ivgren; G Stenberg; M Andre; M Morooka; Y Hobara; S Joko; K Ronnmark; N Cornilleau-Wehrlin; A Fazakerley; H Reme
ANNALES GEOPHYSICAE, 23, 12, 3739-3752, 2005, Peer-reviwed
Scientific journal, English - Statistics of high-altitude and high-latitude O+ ion outflows observed by Cluster/CIS
S Arvelius; M Yamauchi; H Nilsson; R Lundin; Y Hobara; H Reme; MB Bavassano-Cattaneo; G Paschmann; A Korth; LM Kistler; GK Parks
ANNALES GEOPHYSICAE, 23, 5, 1909-1916, 2005, Peer-reviwed
Scientific journal, English - New ELF observation system at Moshiri, Japan, and assessments of acquired data
Y. Ando; P. Maltsev; A. Sukhynyuk; T. Goto; T. Yamauchi; Y. Hobara; M. Sekiguchi; Y. Ikegami; M. Sera; V. Korepanov; M. Hayakawa
J. Atmos. Electr., 25, 1, 29-39, 2005, Peer-reviwed
Scientific journal, English - Low-latitude ionospheric turbulence observed by Aureol-3 satellite
Y Hobara; F Lefeuvre; M Parrot; OA Molchanov
ANNALES GEOPHYSICAE, 23, 4, 1259-1270, 2005, Peer-reviwed
Scientific journal, English - Multi-spacecraft determination of wave characteristics near the proton gyrofrequency in high-altitude cusp
D Sundkvist; A Vaivads; M Andre; JE Wahlund; Y Hobara; S Joko; VV Krasnoselskikh; YV Bogdanova; SC Buchert; N Cornilleau-Wehrlin; A Fazakerley; JO Hall; H Reme; G Stenberg
ANNALES GEOPHYSICAE, 23, 3, 983-995, 2005, Peer-reviwed
Scientific journal, English - Cluster observations of high altitude oxygen outflow burst and associated wave activities
Y. Hobara; H. Nilsson; S. Arvelius; R. Lundin; D. Sundkvist; M. Andre; N. Cornilleau-Wehrlin
General assembly of European Geophysical Union, -, 2005, Peer-reviwed
International conference proceedings, English - Sprite-attributed infrasonic chirps – their detection, occurrence and properties between 1994 and 2004
L. Liszka; Y. Hobara
IAGA, -, 2005, Peer-reviwed
International conference proceedings, English - Cluster observations of high altitude oxiygen outflow burst and associated wave activities
Y. Hobara; H. Nilsson; S. Arvelius; R. Lundin; D. Sundkvist; M. Andre; N. Cornilleau-Wehrlin
IAGA, -, 2005, Peer-reviwed
International conference proceedings, English - Cluster observations of high altitude oxygen outflow burst and associated wave activities
Y. Hobara; H. Nilsson; S. Arvelius; R. Lundin; D. Sundkvist; M. Andre; N. Cornilleau-Wehrlin; A. Balogh; S. C. Buchert; H. Reme; J.-A. Sauvaud
EISCAT Workshop, -, 2005, Peer-reviwed
International conference proceedings, English - Observation of sprites over the Sea of Japan and conditions for lightning-induced sprites in winter
M Hayakawa; T Nakamura; Y Hobara; E Williams
JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, 109, A1, Jan. 2004, Peer-reviwed
Scientific journal, English - Links of Schumann resonance intensity with average global land temperature
M. Sekiguchi; M. Hayakawa; Y. Hobara; A. Nickolaenko; E. Williams
Radio Physics and Electronics, 9, 2, 383-391, 2004, Peer-reviwed
Scientific journal - Characteristics of ULF magnetic anomaly before earthquakes
Y Hobara; HC Koons; JL Roeder; K Yumoto; A Hayakawa
PHYSICS AND CHEMISTRY OF THE EARTH, 29, 4-9, 437-444, 2004, Peer-reviwed
Scientific journal, English - Summary report of NASDA's earthquake remote sensing frontier project
M Hayakawa; OA Molchanov
PHYSICS AND CHEMISTRY OF THE EARTH, 29, 4-9, 617-625, 2004, Peer-reviwed
Scientific journal, English - Localized waves near proton gyrofrequency in high-altitude cusp: Novel results from Cluster multi-spacecraft observations
D. Sundkvist; A. Vaivads; J. E. Wahlund; M. Andre; J. O. Hall; Y. V. Bogdanova; S. Buchert; N. Cornilleau-Wehrlin; Y. Hobara; G. Stenberg
General Assembly of European Geophysical Union, -, 2004, Peer-reviwed
International conference proceedings, English - Comparative study of ULF emissions associated with large earthquakes
Y. Hobara; H. C. Koons; J. L. Roeder; K. Yumoto; M. Hayakawa
General Assembly of European Geophysical Union, -, 2004, Peer-reviwed
International conference proceedings, English - High altitude oxygen outflow observed by cluster satellites: Energization and subsequent wave activities
Y. Hobara; H. Nilsson; S. Joko; R. Lundin; D. Sundkvist; M. Andre; N. Cornilleau-Wehrlin
General Assembly of European Geophysical Union, -, 2004, Peer-reviwed
International conference proceedings, English - Phase-bunching effects in triggered VLF emissions: Antenna effect
VY Trakhtengerts; AG Demekhov; Y Hobara; M Hayakawa
JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, 108, A4, Apr. 2003, Peer-reviwed
Scientific journal, English - Phase-bunching effects in triggered VLF emissions: Antenna effect
V. Y. Trakhtengerts; A. G. Demekhov; Y. Hobara; M. Hayakawa
Journal of Geophysical Research: Space Physics, Blackwell Publishing Ltd, 108, 4, 2003, Peer-reviwed
Scientific journal, English - Observation of sprites over the Sea of Japan and conditions for lightning-induced sprites in winter
M Hayakawa; T Nakamura; Y Hobara; E Williams
ASIA-PACIFIC CONFERENCE ON ENVIRONMENTAL ELECTROMAGNETICS, CEEM'2003, PROCEEDINGS, 533-535, 2003, Peer-reviwed
International conference proceedings, English - Lightning discharges in association with mesospheric tles and their effect to the lower ionosphere
Y. Hobara; M. Hayakawa; K. Ohta; H. Fukunishi
Advances in Polar Upper Atmospheric Research, National Institute of Polar Research, 17, 30-47, 2003, Peer-reviwed, A quantitative and statistical analysis was performed using data from coordinated measurements consisting of ELF waves, VLF subionospheric disturbances and lightning discharges associated with transient luminous events(TLEs). These TLEs(sprites and elves) were observed during winter lightning storms over the Sea of Japan in the winter of 1998/99. A clear, straightforward relationship was found between the charge moment of the parent discharge, calculated from ELF(f<15Hz) transients, and the ionospheric disturbances, with a correlation coefficient of 0.97 independent of the type of TLEs; this suggests significant atmosphere-mesosphere-ionosphere coupling and implies that a large quasi-electrostatic(QE) field change occurring above lightning discharges with TLEs plays a significant role in modifying the electrical properties of the lower ionosphere. Sprites tend to be associated with large ionospheric disturbancs(-13〜+ 4.6dB, compared with the unperturbed waves) and a large charge moment(260-875Ckm), whereas a relatively large lightning peak current(+223〜+ 470kA,)(or a slow-tail amplitude) leading to a strong electromagnetic pulse(EMP) but with a rather small ionospheric disturbances seems to be necessary to initiate elves.
Scientific journal, English - Variability of sporadic E-layer semi transparency (f(o)E(s) - f(b)E(s)) with magnitude and distance from earthquake epicenters to vertical sounding stations
E. V. Liperovskaya; O. A. Pokhotelov; Y. Hobara; M. Parrot
NATURAL HAZARDS AND EARTH SYSTEM SCIENCES, 3, 3-4, 279-284, 2003, Peer-reviwed
Scientific journal, English - ELF transients and ionospheric disturbances in association with sprites and elves
Y. Hobara; M. Hayakawa; K. Ohta; H. Fukunishi; E. R. Williams
The 12th International Conference on Atmospheric Electricity, 307-316, 2003, Peer-reviwed
International conference proceedings, English - Ionospheric turbulence associated with seismic activity from Aureol-3 satellite data
Y. Hobara; M. Parrot; F. Lefeuvre; O.A. Molchanov
EGS-AGU-EUG Joint Assembly, -, 2003, Peer-reviwed
International conference proceedings, English - Optical phenomena in association with lightning and various related phenomena
M. Hayakawa; T. Otsuyama; Y. Hobara; T. Nakamura
Applied Optics, 2, 14-21, 2002, Peer-reviwed
Scientific journal, Japanese - ULF/ELF observation in Seikoshi, Japan, and the precursory signal for recent large seismic events
Y. Hobara; H. C. Koons; J. L. Roeder; M. Hayakawa
URSI 2002 General Assembly, -, 2002, Peer-reviwed
International conference proceedings, English - Global mapping of lightning activity by using a single station based on ELF transients observed in Japan
Y. Hobara; M. Hayakawa; E. R. Williams
URSI 2002 General Assembly, -, 2002, Peer-reviwed
International conference proceedings, English - Ionospheric perturbation in association with seismic activity, a statistical study
Y. Hobara; M. Parrot
URSI 2002 General Assembly, -, 2002, Peer-reviwed
International conference proceedings, English - Interrelation between ELF transients and ionospheric disturbances in association with sprites and elves
Y. Hobara; M. Hayakawa; K. Ohta; H. Fukunishi; E. R. Williams
URSI 2002 General Assembly, -, 2002, Peer-reviwed
International conference proceedings, English - A role of the second-order cyclotron resonance effect in a self-consistent approach to triggered VLF emissions
VY Trakhtengerts; Y Hobara; AG Demekhov; M Hayakawa
JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, 106, A3, 3897-3904, Mar. 2001, Peer-reviwed
Scientific journal, English - Interrelation between ELF transients and ionospheric disturbances in association with sprites and elves
Y Hobara; N Iwasaki; T Hayashida; M Hayakawa; K Ohta; H Fukunishi
GEOPHYSICAL RESEARCH LETTERS, 28, 5, 935-938, Mar. 2001, Peer-reviwed
Scientific journal, English - Cyclotron amplification of whistler waves by nonstationary electron beams in an inhomogeneous magnetic field
AG Demekhov; VY Trakhtengerts; Y Hobara; M Hayakawa
PHYSICS OF PLASMAS, 7, 12, 5153-5158, Dec. 2000, Peer-reviwed
Scientific journal, English - Formation of electron beams by the interaction of a whistler wave packet with radiation belt electrons
Y Hobara; VY Trakhtengerts; AG Demekhov; M Hayakawa
JOURNAL OF ATMOSPHERIC AND SOLAR-TERRESTRIAL PHYSICS, 62, 7, 541-552, May 2000, Peer-reviwed
Scientific journal, English - New ELF observation site in Moshiri, Hokkaido Japan, and the results of preliminary data analysis
Y. Hobara; N. Iwasaki; T. Hayashida; N. Tsuchiya; E. R. Williams; M. Sera; Y. Ikegami; M. Hayakawa
J. Atmos. Electr., 20, 99-109, 2000, Peer-reviwed
Scientific journal, English - Wide-band ULF/ELF magnetic field measurement in Seikoshi, Izu Japan, and some results from preliminary data analysis in relation with seismic activity
Y. Hobara; H. Yamaguchi; T. Watanabe; Y. Akinaga; H. C. Koons; J. L. Roeder; M. Hayakawa
J. Atmos. Electr., 20, 111-121, 2000, Peer-reviwed
Scientific journal, English - Long-term periodical variations in global lightning activity deduced from the Schumann resonance monitoring
AP Nickolaenko; R Hayakawa; Y Hobara
JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, 104, D22, 27585-27591, Nov. 1999, Peer-reviwed
Scientific journal, English - Theory of second-order cyclotron resonance as related to the origin of discrete vlf emissions in the magnetosphere
A. G. Demekhov; V. Yu. Trakhtengerts; Y. Hobara; M. Hayakawa
Radiophysics and Quantum Electronics, Springer New York LLC, 42, 8, 625-638, 01 Aug. 1999
Scientific journal, English - Beam-plasma instability in inhomogeneous magnetic field and second order cyclotron resonance effects
VY Trakhtengerts; Y Hobara; AG Demekhov; M Hayakawa
PHYSICS OF PLASMAS, 6, 3, 692-698, Mar. 1999, Peer-reviwed
Scientific journal, English - Whistler cyclotron instability and second order cyclotron resonance effects in the magnetosphere
VY Trakhtengerts; Y Hobara; AG Demekhov; M Hayakawa
MICROSCOPIC PROCESSES IN SPACE PLASMAS AND THEIR ROLE IN MACROSCALE PHENOMENA, 24, 1, 35-42, 1999, Peer-reviwed
Scientific journal, English - Cyclotron amplification of whistler waves
Y Hobara; VY Trakhtengerts; AG Demekhov; M Hayakawa
MICROSCOPIC PROCESSES IN SPACE PLASMAS AND THEIR ROLE IN MACROSCALE PHENOMENA, 24, 1, 95-98, 1999, Peer-reviwed
Scientific journal, English - Formation of electron beams under the interaction of a whistler wave packet with the radiation belt electrons
Y Hobara; VY Trakhtengerts; AG Demekhov; M Hayakawa
ACTIVE EXPERIMENTS IN SPACE PLASMAS, 24, 8, 1007-1010, 1999, Peer-reviwed
Scientific journal, English - Self-consistent theory of triggered VLF emissions: An analytical approach
VY Trakhtengerts; Y Hobara; AG Demekhov; M Hayakawa
ACTIVE EXPERIMENTS IN SPACE PLASMAS, 24, 8, 1011-1014, 1999, Peer-reviwed
Scientific journal, English - Cyclotron amplification of whistler waves by electron beams in an inhomogeneous magnetic field
Y Hobara; VY Trakhtengerts; AG Demekhov; M Hayakawa
JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, 103, A9, 20449-20458, Sep. 1998, Peer-reviwed
Scientific journal, English - Schumann resonance and global lightning activity
AP Nickolaenko; M Hayakawa; Y Hobara
1998 INTERNATIONAL CONFERENCE ON MATHEMATICAL METHODS IN ELECTROMAGNETIC THEORY, VOLS 1 AND 2, 296-297, 1998, Peer-reviwed
International conference proceedings, English - On estimating the amplitude of Jovian whistlers observed by Voyager 1 and implications concerning lightning
Y Hobara; S Kanemaru; M Hayakawa; DA Gurnett
JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, 102, A4, 7115-7125, Apr. 1997, Peer-reviwed
Scientific journal, English - Ducted propagation of lightning - generated whistlers in the Jovian magnetosphere
Y. Hobara; M. Hayakawa
J. Atmos. Electr, 17, 17, 33-45, 1997, Peer-reviwed
Scientific journal, English - Temporal variations of the global lightning activity deduced from the Schumann resonance data
AP Nickolaenko; M Hayakawa; Y Hobara
JOURNAL OF ATMOSPHERIC AND TERRESTRIAL PHYSICS, 58, 15, 1699-1709, Nov. 1996, Peer-reviwed
Scientific journal, English - Diurnal variations of the global thunderstorm activity deduced from the Schumann resonance records
AP Nickolaenko; M Hayakawa; Y Hobara
ELECTROMAGNETIC COMPATIBILITY 1996 - THIRTEENTH INTERNATIONAL WROCLAW SYMPOSIUM, 617-618, 1996, Peer-reviwed
International conference proceedings, English - Characteristics of mid-latitude ducts deduced by direction finding of whistlers with nose extension method.
嶋直樹; 太田健次; 北川智美; 芳原容英; 永井由佳; 早川正士
Trans. IEICE, The Institute of Electronics, Information and Communication Engineers, J79-B-II, 9, 549-556, 1996, Peer-reviwed, 中緯度ホイスラの伝搬特性,特に中緯度ホイスラダクトの諸特性を1994年8月ニュージーランド・ドニーデン(磁気緯度53.1°S : L=2.78 (Lは観測点を通る磁力線が赤道面と遭遇する地球中心からの高度を地球半径で割った値) )および1989年8月オーストラリア・セドナ(磁気緯度44.0°S : L=1.93)における約2週間にわたるホイスラ観測(水平磁界2成分,垂直電界1成分の波形観測)に基づいて調査した.多数のホイスラに対する電磁界3成分による偏波解析を行い,それぞれの観測地点上空の電離層を透過したホイスラを同定した.これらのホイスラの磁気圏伝搬路(Ln)はソース・イクステンション法を用いることによりL_n=2.84±0.06(ドニーデン),2.41±0+22(セドナ)と評価された.これらは,それぞれの観測地点上空の電離層(高度150km)のL値(L_=2.85:ドニーデン, L_ =1.98:セドナ)と比べて,ドニーデンの場合はほぼ同じ,セドナの場合は0.43だけ小さいことが判明した.このことからドニーデンの場合では,従来のStrangewaysらが求めた中緯度におけるダクト伝搬ホイスラの特性とは異なり,ダクトが電離層高度まで伸びていると考えられる.しかしながら,セドナの場合はStrangewaysらの結果とほぼ一致する.これらのことはダクト構造の緯度および時間依存性を示唆しているものと考えられる.また,セドナにおける観測事実を説明するため上昇および下降ホイスラに対する種々のレイトレーシングを行った結果,セドナにて観測されたホイスラダクトの終端高度は3,500〜6,500kmであること,エンハンスメント因子は数パーセント以上であることなどがわかった.
Scientific journal, Japanese - PROPAGATION CHARACTERISTICS OF WHISTLER WAVES IN THE JOVIAN IONOSPHERE AND MAGNETOSPHERE
Y HOBARA; OA MOLCHANOV; M HAYAKAWA; K OHTA
JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, 100, A12, 23523-23531, Dec. 1995, Peer-reviwed
Scientific journal, English - METHOD OF MODELING OF VLF WAVE-PROPAGATION IN THE EARTHS MAGNETOSPHERE AND UPPER IONOSPHERE
OA MOLCHANOV; OA MALTSEVA; M HAYAKAWA; Y HOBARA
RADIO SCIENCE, 30, 5, 1597-1611, Sep. 1995, Peer-reviwed
Scientific journal, English - Lighting and whistler waves in the Jovian ionosphere and magnetosphere
Yasuhide Hobara; Ken Nagai; Kenji Ohta; Masashi Hayakawa
IEEE International Symposium on Electromagnetic Compatibility, IEEE, 685-688, 1994
International conference proceedings, English - TRANSMISSION CHARACTERISTICS OF VLF ELF RADIO-WAVES THROUGH THE JOVIAN IONOSPHERE
K NAGAI; K OHTA; Y HOBARA; M HAYAKAWA
GEOPHYSICAL RESEARCH LETTERS, 20, 22, 2435-2438, Nov. 1993, Peer-reviwed
Scientific journal, English
MISC
- 気象用二重フェーズドアレイ気象レーダとLF帯雷放電装置を用いた雲内粒子と放電過程の時系列変化
鹿倉周太郎; 菊池博史; 芳原容英; 吉川英一; 中村佳敬; 森本健志; 牛尾知雄
2023, 大気電気学会誌(Web), 17, 1, 1882-0549, 202302222914407911 - 国際宇宙ステーションGLIMSミッションにより観測された雷発光強度を用いた雷の電気的特性導出に関する研究
鈴木克徳; 柿沼遠方; 芳原容英; 佐藤光輝; 高橋幸弘; 足立透; 牛尾知雄; 河崎善一郎; 森本健志; 山崎敦; 鈴木睦; LINSCOTT I. R; INAN U. S
15 Nov. 2017, 大気電気学会誌, 11, 1, 102‐103, Japanese, 1882-0549, 201802261615117198 - An overview of VHF lightning observations by digital interferometry from ISS/JEM-GLIMS
Takeshi Morimoto; Hiroshi Kikuchi; Mitsuteru Sato; Tomoo Ushio; Atsushi Yamazaki; Makoto Suzuki; Ryohei Ishida; Yuji Sakamoto; Kazuya Yoshida; Yasuhide Hobara; Takuki Sano; Takumi Abe; Zen Ichiro Kawasaki
01 Dec. 2016, Earth, Planets and Space, 68, 1, Book review, 1343-8832, 1880-5981, 84983085442 - GLIMSミッションにより観測された雷放電の発光面積・強度とその電気的特性に関する研究
柿沼遠方; 芳原容英; 牛尾知雄; 河崎善一郎; 森本健志; 佐藤光輝; 山崎敦; 鈴木睦
10 Apr. 2016, 大気電気学会誌, 10, 1, 52‐53, Japanese, 1882-0549, 201602260705513609 - 日本の将来のためにできること アカデミックの現場から
芳原 容英
稲城市, 2016, 稲城市生涯学習課 梨のしおり, *, Japanese, Others - JEM‐GLIMSミッションにより観測された雷発光現象と落雷電荷モーメントとの関係
柿沼遠方; 芳原容英; 牛尾知雄; 河崎善一郎; 森本健志; 佐藤光輝; 山崎敦; 鈴木睦
20 Apr. 2015, 大気電気学会誌, 9, 1, 132-133, Japanese, 1882-0549, 201502223828182410 - 国際宇宙ステーションGLIMSミッションにより観測されたホイスラを用いた電離層F層の電子密度推定
鈴木克徳; 柿沼遠方; 芳原容英; LINSCOTT I.R; INAN U.S; 佐藤光輝; 高橋幸弘; 牛尾知雄; 河崎善一郎; 森本健志; 山崎敦; 鈴木睦
20 Apr. 2015, 大気電気学会誌, 9, 1, 92-93, Japanese, 1882-0549, 201502296887711343 - 国際宇宙ステーションからの雷放電と高高度発光現象の観測
牛尾知雄; 佐藤光輝; 鈴木睦; 森本健志; 菊池博史; 菊池雅行; 足立透; 山崎敦; 高橋幸弘; INAN U.; LINSCOTT I.; 石田良平; 坂本祐二; 吉田和哉; 芳原容英; 阿部琢己; 中村正人; 織田裕久
2015, 日本気象学会大会講演予稿集, 108, 201502220137143909 - 国際宇宙ステーションGLIMSミッションにより観測された雷発光とホイスラを用いた電離層F層の電子密度推定
鈴木克徳; 柿沼遠方; 芳原容英; LINSCOTT Ivan; INAN Umran; 佐藤光輝; 高橋幸弘; 牛尾知雄; 河崎善一郎; 森本健志; 山崎敦; 鈴木睦
2015, 日本地球惑星科学連合大会予稿集(Web), 2015, ROMBUNNO.PEM11‐12 (WEB ONLY), Japanese, 201702229130999610 - 雷放電の国際宇宙ステーション搭載GLIMSミッション及び地上同時観測による大気圏・電離圏結合に関する研究
柿沼遠方; 芳原容英; 牛尾知雄; 河崎善一郎; 森本健志; 佐藤光輝; 山崎敦; 鈴木睦
18 Apr. 2014, 大気電気学会誌, 8, 1, 145-146, Japanese, 1882-0549, 201402285809424894 - P320 衛星光学観測に基づく雷放電特性の導出(ポスターセッション)
足立 透; 佐藤 光輝; 牛尾 知雄; 山崎 敦; 鈴木 睦; 菊池 雅行; 高橋 幸弘; Inan Umran; Linscott Ivan; 芳原 容英; Cohen M. B.; Lu G.; Cummer S. A.; Hsu R. R.; Chen A. B.; Frey H. U.
日本気象学会, 2014, 大会講演予講集, 105, 296-296, Japanese, 110009846752, AA11552241 - 地震に伴う電離層擾乱の発生機構に関する研究 : 大気振動説の計算機シミュレーション
遠藤 貴士; 芳原 容英; 松村 充; 早川 正士
26 Apr. 2013, 大気電気学会誌 = / Society of Atmospheric Electricity of Japan, 7, 1, 75-76, Japanese, 1882-0549, 10031170131, AA12292204 - ELF帯トランジェント観測及びLF帯落雷標定ネットワークを用いた日本周辺落雷の時空間分布と電気的特性
中村 遼平; 芳原 容英; 塩川 和夫
26 Apr. 2013, 大気電気学会誌 = / Society of Atmospheric Electricity of Japan, 7, 1, 91-92, Japanese, 1882-0549, 10031170139, AA12292204 - 高密度VLF帯送信電波観測ネットワークを用いた大地電離層擾乱に関する研究
奥埜 竜一; 芳原 容英; 岩本 真彦; 飯沼 恒一; 山田 一雅; 嶋 直樹; 塩川 和夫
26 Apr. 2013, 大気電気学会誌 = / Society of Atmospheric Electricity of Japan, 7, 1, 54-55, Japanese, 1882-0549, 10031170120, AA12292204 - 北海道母子里で観測された地震に先行するELF帯磁場放射とULF帯磁場減少に関する研究
安江 剛広; 芳原 容英; 早川 正士; SCHEKOTOV A. Y.
26 Apr. 2013, 大気電気学会誌 = / Society of Atmospheric Electricity of Japan, 7, 1, 152-153, Japanese, 1882-0549, 10031170171, AA12292204 - B118 JEM-GLIMSによる宇宙からの雷・超高層放電の多波長観測(竜巻・雷,口頭発表)
足立 透; 佐藤 光輝; 牛尾 知雄; 山崎 敦; 鈴木 睦; 菊池 雅行; 高橋 幸弘; Inan Umran; Linscott Ivan; 芳原 容英
日本気象学会, 2013, 大会講演予講集, 104, 79-79, Japanese, 110009801349, AA11552241 - 国際宇宙ステーションからの雷放電とスプライトの国際共同観測
牛尾 知雄; 森本 健志; 佐藤 光輝; 鈴木 睦; 山崎 敦; 芳原 容英; 菊地 雅行; 高橋 幸弘; 石田 良平; 坂本 祐二; 吉田 和哉; 阿部 琢美; 河崎 善一郎
15 Nov. 2012, 大気電気学会誌 = / Society of Atmospheric Electricity of Japan, 6, 2, 82, Japanese, 1882-0549, 10031128631, AA12292204 - ELFトランジェント及びLF帯落雷標定ネットワークを用いた日本周辺落雷の電気的特性
中村 遼平; 芳原 容英; 塩川 和夫; 早川 正士
15 Nov. 2012, 大気電気学会誌 = / Society of Atmospheric Electricity of Japan, 6, 2, 76-77, Japanese, 1882-0549, 10031128628, AA12292204 - 国際宇宙ステーションからの雷放電とスプライトの国際共同観測
牛尾知雄; 森本健志; 佐藤光輝; 鈴木睦; 山崎敦; 芳原容英; 菊地雅行; 高橋幸弘; INAN Umran; 石田良平; 坂本祐二; 吉田和哉; 阿部琢美; 河崎善一郎
2012, 大気電気学会誌, 6, 2, 1882-0549, 201202222321410014 - 3D-FDTD法を用いた中間圏発光現象に伴う電離層擾乱についての数値解析
岩本真彦; 芳原容英; 成毛亮介; 大津山卓哉; 太田健次; 早川正士
2012, 大気電気学会誌, 6, 1, 1882-0549, 201202249599482445 - ELF帯トランジェントを用いた落雷位置および電荷モーメントの導出
井上 隆裕; 芳原 容英; 早川 正士; 鍵山 恒臣; 宇津木 充
15 Apr. 2011, 大気電気学会誌 = / Society of Atmospheric Electricity of Japan, 5, 1, 133-134, Japanese, 1882-0549, 10028198095, AA12292204 - Lightning and sprite observation from international space station
Tomoo Ushio; Mitsuteru Sato; Takeshi Morimoto; Makoto Suzuki; Hiroshi Kikuchi; Atsushi Yamazaki; Yukihiro Takahashi; Yasuhide Hobara; Umran Inan; Umran Inan; Ivan Linscott; Ivan Linscott; Yuji Sakamoto; Yuji Sakamoto; Ryohei Ishida; Ryohei Ishida; Masavuki Kikuchi; Masavuki Kikuchi; Kazuya Yoshida; Kazuya Yoshida; Zen Ichiro Kawasaki
28 Feb. 2011, IEEJ Transactions on Fundamentals and Materials, 131, 16-20, 0385-4205, 79951903581 - 中間圏発光現象に伴うVLF帯送信電波擾乱の数値解析
岩本真彦; 芳原容英; 大津山卓哉; 太田健次; 早川正士
2011, 大気電気学会誌, 5, 1, 1882-0549, 201102255096906798 - 3次元空間における中間圏発光現象に伴う電離層擾乱についての数値解析
岩本真彦; 芳原容英; 成毛亮介; 大津山卓哉; 太田健次; 早川正士
2011, 大気電気学会誌, 5, 2, 1882-0549, 201102236805751227 - Lightning and Sprite Observation from International Space Station
USHIO Tomoo; SATO Mitsuteru; MORIMOTO Takeshi; SUZUKI Makoto; KIKUCHI Hiroshi; YAMAZAKI Atsushi; TAKAHASHI Yukihiro; HOBARA Yasuhide; INAN Umran; ISHIDA Ryohei; KAWASAKI Zen-Ichiro
01 Nov. 2010, 電気学会研究会資料. EMC, 電磁環境研究会, 2010, 29, 1-4, Japanese, 10027631055 - A209 国際宇宙ステーションからの雷放電と高高度発光現象の観測(GLIMS)(降水システムI,一般口頭発表)
牛尾,知雄; 森本,健志; 佐藤,光輝; 鈴木,睦; 山崎,敦; 芳原,容英; 菊地,雅行; 高橋,幸弘; 石田,良平; 坂本,祐二; 吉田,和哉; 阿部,琢美; 河崎,善一郎
日本気象学会, 30 Apr. 2010, 大会講演予講集, 97, 52, Japanese, 110007728906, AA11552241 - 中間圏発光現象に伴う電離層擾乱のシミュレーションに関する研究
藤井裕之; 芳原容英; 早川正士; 松戸悠; 大津山卓哉; 太田健次
2010, 大気電気学会誌, 4, 1, 1882-0549, 201002283956491805 - 国際宇宙ステーションからの雷放電・スプライト観測計画 : JEM-GLIMSミッション
佐藤 光輝; 牛尾 知雄; 森本 健志; 高橋 幸弘; 芳原 容英; 菊池 雅行; 鈴木 睦; 山崎 敦; 阿部 琢美; 吉田 和哉; 坂本 祐二; 奥山 圭一; 石田 良平; 河崎 善一郎
30 Oct. 2009, 大気電気学会誌 = / Society of Atmospheric Electricity of Japan, 3, 2, 60-61, Japanese, 1882-0549, 10025594045, AA12292204 - GLIMSミッションに期待される科学~雷放電~
森本健志; 牛尾知雄; 佐藤光輝; 高橋幸弘; INAN Umran; 芳原容英; 菊池雅行; 鈴木睦; 山崎敦; 阿部琢美; 吉田和哉; 坂本祐二; 奥山圭一; 石田良平; 河崎善一郎
2009, 大気圏シンポジウム・講演集(Web), 23rd, 201002206032871780 - GLIMSミッションに期待される科学:地球ガンマ線現象
高橋幸弘; 嘉瀬浩美; 牛尾知雄; 森本健志; 佐藤光輝; INAN Umran; 芳原容英; 菊池雅行; 鈴木睦; 山崎敦; 阿部琢美; 吉田和哉; 坂本祐二; 奥山圭一; 石田良平; 河崎善一郎
2009, 大気圏シンポジウム・講演集(Web), 23rd, 201002227229213854 - JEM-GLIMSミッションの概要
牛尾知雄; 鈴木睦; 佐藤光輝; 森本健志; 高橋幸弘; 芳原容英; 菊池雅行; INAN Umran; 山崎敦; 阿部琢美; 河崎善一郎
2009, 大気圏シンポジウム・講演集(Web), 23rd, 201002255880876164 - GLIMSミッションに期待される科学:高高度発光現象
佐藤光輝; 牛尾知雄; 森本健志; 高橋幸弘; INAN Umran; 芳原容英; 菊池雅行; 石田良平; 吉田和哉; 坂本祐二; 奥山圭一; 河崎善一郎; 鈴木睦; 山崎敦; 阿部琢美
2009, 大気圏シンポジウム・講演集(Web), 23rd, 201002295224478510 - ELF transientsを用いた世界雷放電分布の導出
山下幸三; 大津山卓哉; 芳原容英; 関口美菜子; 松戸悠; 早川正士
2007, 大気電気学会誌, 1, 1, 1882-0549, 200902248935797253 - 雷放電に伴う発光現象および電磁放射について
大津山卓哉; 芳原容英; 早川正士
1999, 大気電気研究, 54, 0286-3405, 200902136629950118 - Preliminary result of Japan and Australia joint campaign. VLF/ELF wave.
大津山卓哉; 土谷敬亮; 芳原容英; 早川正士
1997, 大気電気研究, 51, 0286-3405, 200902131991844570
Books and other publications
- これからのＥＭＣ
芳原容英
Others, Japanese, Joint work, 科学情報出版, 05 Jan. 2019 - ユニーク＆エキサイティングサイエンス
梶谷誠; 芳原容英
Japanese, Joint work, 地震の予測は可能か？電波の威力！, 近代科学社, Mar. 2013 - Geomatics, Natural Hazards and Risk volume4,Issue3,2013
English, Joint work, The lower ionospheric perturbation as a precursor to the 11 March 2011 Japan earthquake, Taylor & Francis, Jan. 2013 - Lighting effects in the mesosphere and ionosphere
M. Hayakawa; Y. Hobara; T.Suzuki
English, Joint work, The Institution of engineering and technology, Jan. 2012 - 地震に関連するULF帯磁場データの統計的解析、「地震予知研究の最前線」、早川正士編
芳原容英; 山口弘輝; 早川正士
Japanese, Joint work, 日本専門図書出版㈱, 2012 - VHF帯電波を用いた地震予知の可能性、「地震予知研究の最前線」、早川正士編
安田好広; 芳原容英; 早川正士
Japanese, Joint work, 日本専門図書出版㈱, 2012 - VLF/LF送信局電波を用いた電離圏擾乱観測に基づく地震予知研究、「地震予知研究の最前線」、早川正士編
早川正士; 芳原容英
Japanese, Joint work, 日本専門図書出版㈱, 2012 - Lightning Electromagnetics
Y.Hobara; M. Hayakawa
English, Joint work, Chapter 16:Lightning effects in the mesosphere and ionosphere Chapter 17:The effects of lightning on the ionosphere/magnetosphere, IET, 2012 - Sprites, Elves and Intensive Lightning Discharges
Y. Hobara; M. Hayakawa; E. Williams; R. Boldi; E. Downes
English, Joint work, Location and electrical properties of sprite-producing lightning from a single ELF site, Springer, 2006 - Introduction to Atmospheric Electricity
芳原容英
Japanese, Joint work, 3.7節 空電関連現象, Corona Pub. Comp., 2003 - Seismo Electromagnetics: Lithosphere-Atmosphere-Ionosphere Coupling
H. C. Koons; J. L. Roeder; Y. Hobara; M. Hayakawa; A. C. Fraser-Smith
English, Joint work, Statistical analysis of the data from ULF sensors at Seikoshi Station, TERRAPUB, 2002 - Seismo Electromagnetics: Lithosphere-Atmosphere-Ionosphere Coupling
Y. Hobara; H. C. Koons; J. L. Roeder; H. Yamaguchi; M. Hayakawa
English, Joint work, New ULF/ELF observation in Seikoshi, Izu, Japan, and the precursory signal in relation with recent large seismic events near Izu, TERRAPUB, 2002
Lectures, oral presentations, etc.
- 電波観測を用いた極端気象及び大電荷量雷リスクの監視と予測
芳原容英
Keynote oral presentation, 2024 雷リスクシンポジウム, Invited
04 Jun. 2024 - Machine Learning to predict Downbursts in Japan Based on Total Lightning and Ground Precipitation Data
Alexander Shvets; Yasuhide Hobara; Shiho Miyashita; Hiroshi Kikuchi; Jeff Lapierre; Elizabeth DiGangi
Oral presentation, EGU General Assembly 2024
18 Apr. 2024 - Anomalous Atmospheric Electric Field Just around the Time of Earthquakes: Case and statistical studies
Yasuhide Hobara; Mako Watanabe; Mio Hongo; Hiroshi Kikuchi; Takuo Tsuda; Masashi Hayakawa
Poster presentation, EGU General Assembly 2024, Invited, Peer-reviewed
16 Apr. 2024 - Prediction of Downbursts Using Machine Learning of Total Lightning and Ground Precipitation Data in Japan
Y. Hobara; S. Miyashita; H. Kikuchi; J. Lapierre; T. Ushio
URSI GASS 2023, Peer-reviewed
Aug. 2023 - Observations of summer thunderstorms with X-band dual polarized phased array weather radar and LF/MF band lightning location system
H. Kikuchi; Y. Nakamura; E. Yoshikawa; T. Morimoto; T. Ushio; Y. Hobara
URSI GASS 2023, Peer-reviewed
Aug. 2023 - Total Lightning Distribution and Heavy Rainfall Characteristics Associated With Multicellular Thunderstorms
D. Mondal; Y. Hobara; H. Kikuchi; J. Lapierre
Oral presentation, URSI GASS 2023, Peer-reviewed
Aug. 2023 - Monitoring and prediction of terrestrial and space environments using natural and man-made electromagnetic noises
Y. Hobara
Invited oral presentation, English, URSI-JRSM2022, International conference
02 Sep. 2022 - Modeling Atmosphere-Ionosphere Coupling during Typhoon 15 Using FDTD Method
A. D. Setiawan; Y.Hobara; H. Kikuchi
Invited oral presentation, English, URSI-JRSM2022, International conference
02 Sep. 2022 - Observations of Precipitation Cores with X-band Dual Polarized Phased Array Weather Radar and LF Band Lightning Location System
H. Kikuchi; E. Yoshikawa; Y. Nakamura; T. Morimoto; T. Ushio; Y. Hobara
Invited oral presentation, English, URSI-JRSM2022, International conference
02 Sep. 2022 - Thunderstorms and Total Lightning Characteristics Causing Heavy Precipitation in Japan: A Case Study
D. Mondal; Y. Hobara; H. Kikuchi; J. Lapierre
Invited oral presentation, English, URSI-JRSM2022, International conference
02 Sep. 2022 - Variations of the Effective Height of the Lower Ionosphere according to the Results of Tweek-Atmospherics Measurements in the Northern and Southern Hemispheres
A. Shvets; V. Ivanov; Y. Hobara; O. Koloskov; Y. Yampolsky
Invited oral presentation, English, URSI-JRSM2022, International conference
02 Sep. 2022 - Lower Ionospheric Fluctuations and Atmospheric Electric Field Immediately around Earthquake
K. Misu; M. Watanabe; H. Kikuchi; Y. Hobara
Invited oral presentation, English, URSI-JRSM2022, International conference
01 Sep. 2022 - Statistical analysis of the Atmospheric Electric Field Fluctuations associated with Earthquakes in Japan
M. Watanabe; Y. Hobara; H. Kikuchi; R. Miyajima
Invited oral presentation, English, URSI-JRSM2022, International conference
01 Sep. 2022 - Atmospheric Electric Field Anomaly Observed Immediately Before and After Earthquakes
Y. Hobara
Oral presentation, English, ICAE2022, ICAE2022, Tel Aviv, Israel, International conference
21 Jun. 2022 - LF帯雷放電標定装置と二重偏波フェーズドアレイ気象レーダを用いた積乱雲の発達過程の観測
菊池 博史; 及川 夏依; 芳原 容英; 中村 佳敬; 吉川 栄一; 森本 健志; 牛尾 知雄
Oral presentation, Japanese, 日本地球惑星科学連合2022年大会, 日本地球惑星科学連合, 幕張、千葉
02 Jun. 2022 - Modeling Lower Ionospheric Perturbations during Heavy Precipitation Using 2D FDTD Method
A. D. Setiawan; Y. Hobara
Oral presentation, Japanese, 日本地球惑星科学連合2022年大会, 日本地球惑星科学連合, 幕張、千葉
02 Jun. 2022 - Modeling Lower Ionospheric Perturbations During Typhoons 15 and 19 Using 2D FDTD Method
A. D. Setiawan; Y. Hobara; S. Hirai
Oral presentation, English, AT-AP-RASC 2022, AT-AP-RASC 2022, Gran Canaria, Spain, International conference
01 Jun. 2022 - Lower Ionospheric Perturbations Associated with Proton Aurora using Numerical Simulation of Subionospheric VLF Transmitter Signals
Y. Hobara; H. Nomoto; A. Hirai
Oral presentation, English, AT-AP-RASC 2022, AT-AP-RASC 2022, Gran Canaria, Spain, International conference
31 May 2022 - Thunderstorms and total lightning characteristics causing heavy precipitation in Japan
D. Mondal; Y. Hobara; H. Kikuchi
Oral presentation, Japanese, 日本地球惑星科学連合2022年大会, 日本地球惑星科学連合, 幕張、千葉
25 May 2022 - 機械学習を用いた宇宙電磁環境の監視と予測
芳原 容英
Oral presentation, Japanese, 第7回データアントレプレナーカンファレンス - データサイエンスと宇宙科学
17 Jan. 2022 - プロトンオーロラに伴う下部電離層擾乱のモデリングによるVLF帯送信電波異常の数値計算
野本博樹; 芳原 容英; 土屋史紀; 平井あすか
Oral presentation, Japanese, 第100回日本大気電気学会, 日本大気電気学会, オンライン会場
08 Jan. 2022 - 気象用二重偏波フェーズドアレイ気象レーダとLF帯雷放電標定装置を用いた夏季積乱雲の観測
菊池博史; 及川夏依; 芳原容英; 中村佳敬; 吉川栄一; 森本健志; 牛尾知雄
Oral presentation, Japanese, 第100回日本大気電気学会, 日本大気電気学会, オンライン会場
08 Jan. 2022 - 地震直前後に観測された大気電界異常
芳原容英; 宮島理紗; 渡辺真子; 松木翔; 菊池博史
Oral presentation, Japanese, 日本地震予知学会第8回学術講演会, 日本地震予知学会, 東京
25 Dec. 2021 - VLF帯送信電波伝搬の数値計算を用いたプロトンオーロラに伴う下部電離層擾乱のモデリング
野本博樹; 芳原 容英; 土屋史紀; 平井あすか
Oral presentation, Japanese, EMCJ研究会, 電子情報通信学会, オンライン会場
08 Dec. 2021 - Global Distributions of Lightning Electrical Properties Obtained from International Space Station
Y. Hobara; H. Kikuchi; R. Kitamura; M. Sato; Y. Takahashi; T. Adachi; T. Ushio; M. Suzuki
Oral presentation, English, URSI GASS 2021, International conference
30 Aug. 2021 - Total Lightning Activity associated with Extreme Meteorological Events in Japan a View from X-band Radar and Meteorological Satellite
Y. Hobara; H. Kikuchi; R. Aoyagi; M. Stock
Oral presentation, English, URSI GASS 2021, International conference
30 Aug. 2021 - Multi-Point Simultaneous Prediction Model for Electron Flux at Geostationary Orbits
H. Nomoto; Y. Hobara; H. Kikuchi; H. Iibuchi; M. Balikhin
Oral presentation, English, URSI GASS 2021, International conference
30 Aug. 2021 - Detecting Ionospheric Anomalies before Earthquakes by Machine Learning Technique
Y. Hobara; K. Matsuki; H. Santosa
Oral presentation, English, URSI GASS 2021, International conference
30 Aug. 2021 - Monitoring and predicting terrestrial and space environments using electromagnetic methods
Y. Hobara
Invited oral presentation, English, URSI GASS 2021, Invited, International conference
30 Aug. 2021 - Relationship between Atmospheric Electric Fields and Lower Ionospheric Disturbances Associated with Earthquakes
Y. Hobara; K. Matsuki; M. Watanabe; H. Kikuchi; A. Setiwan
Oral presentation, English, IAGA- IASPEI 2021 Virtual conference, IAGA- IASPEI 2021 Virtual conference, India, International conference
26 Aug. 2021 - Spatio-temporal Distributions of Lightning Stroke Charge using ELFand Meteorological Data
Y. Hobara
Keynote oral presentation, English, InECCE 2021, UMP Malaysia, Malaysia, International conference
23 Aug. 2021 - Spatio-temporal characteristics of energetic lightning in Southeast Asia: Preliminary statistical results
S. Akama; Y. Hobara; M. A. Izzani; C. Gomes; K. Shiokawa; S. Hirai; H. Kikuchi; M.Stock
Oral presentation, English, InECCE 2021, UMP Malaysia, Malaysia, International conference
23 Aug. 2021 - マルチパラメータフェーズドアレイ気象レーダを用いた3次元降水コアトラッキング手法の検討
浅井 啓太郎; 菊池 博史; 芳原 容英; 牛尾 知雄
Oral presentation, Japanese, 日本地球惑星科学連合2021年大会
06 Jun. 2021 - 台風に伴う大規模気象擾乱の電離圏への結合過程に関する研究
平井 周; 芳原 容英; 菊池 博史; M. Stock
Oral presentation, Japanese, 日本地球惑星科学連合2021年大会
06 Jun. 2021 - LF帯3次元雷放電標定装置と二重偏波フェーズドアレイ気象レーダを用いた夏季積乱雲の観測事例
菊池 博史; 亀井 悠平; 中村 佳敬; 吉川 栄一; 森本 健志; 牛尾 知雄; 芳原 容英
Oral presentation, Japanese, 日本地球惑星科学連合2021年大会
06 Jun. 2021 - 東南アジアにおけるエネルギー別落雷の時空間特性に関する初期解析
赤間 俊介; 平井 周; 芳原 容英; 菊池 博史; A. Mohamed; C. Gomes; 塩川 和夫; M. Stock
Oral presentation, Japanese, 日本地球惑星科学連合2021年大会
06 Jun. 2021 - 複合電波観測を用いた台風に伴う大気圏と電離圏の関連性に関連する研究
平井周; 芳原容英; 菊池博史; マイケルストック
Oral presentation, Japanese, 電子情報通信学会 環境電磁工学研究会, 電子情報通信学会, オンライン開催
16 Apr. 2021 - 二十偏波フェーズドアレイレーダを用いた粒子判定結果とTotal Lightning Networkによる雷観測結果の比較
及川夏依; 菊池博史; 芳原容英; 牛尾智雄
Oral presentation, Japanese, 第99回日本大気電気学会, 日本大気電気学会, オンライン会場
08 Jan. 2021 - 雷嵐特性のアンサンブル学習を用いた突風発生の予測
宮下志保; 平井周; 芳原容英; 菊池博史; Michael Stock
Oral presentation, Japanese, 第99回日本大気電気学会, 日本大気電気学会, オンライン会場
08 Jan. 2021 - 機械学習を用いた静止軌道上における電子フラックスの多点同時予測モデルの構築と評価
野本博樹; 芳原容英; 菊池博史; 飯淵隼人; Michael Balikhin
Oral presentation, Japanese, 第99回日本大気電気学会, 日本大気電気学会, オンライン会場
08 Jan. 2021 - 二重偏波フェーズドアレイ気象レーダの偏波パラメータに関する精度検証
浅井啓太郎; 菊池博史; 牛尾知雄; 芳原容英
Oral presentation, Japanese, 第99回日本大気電気学会, 日本大気電気学会, オンライン会場
08 Jan. 2021 - 台風に由来する大気圏-電離圏結合に関する研究
平井周; 星野龍一; 芳原容英; 菊池博史; M. Stock
Oral presentation, Japanese, 第99回日本大気電気学会, 日本大気電気学会, オンライン会場
08 Jan. 2021 - 関東圏における3次元雷放電標定装置を用いた初期観測結果
亀井悠平; 菊池博史; 芳原容英; 中村佳敬; 吉川栄一; 森本健志; 牛尾知雄
Oral presentation, Japanese, 第99回日本大気電気学会, 日本大気電気学会, オンライン会場
08 Jan. 2021 - 東南アジアにおける落雷エネルギー別雷嵐の時空間特性
赤間俊介; 平井周; 芳原容英; 菊池博史; Amir Izzani Mohamed; Chandima Gomes; 塩川和夫; Michael Stock
Oral presentation, Japanese, 第99回日本大気電気学会, 日本大気電気学会, オンライン会場
08 Jan. 2021 - 地震に関連する大気電界変動
芳原容英; 宮島理紗; 渡辺真子; 松木翔; 菊池博史
Oral presentation, Japanese, 第99回日本大気電気学会, 日本大気電気学会, オンライン会場
08 Jan. 2021 - 北海道女満別における地震に伴う大気電界変動の調査
渡辺真子; 芳原容英; 菊池博史; 松木翔
Oral presentation, Japanese, 第99回日本大気電気学会, 日本大気電気学会, オンライン会場
08 Jan. 2021 - 地震に伴う大気電界と下部電離層擾乱の関連性に関する研究
松木翔; 宮島理紗; 芳原容英; 菊池博史
Oral presentation, Japanese, 第99回日本大気電気学会, 日本大気電気学会, オンライン会場
08 Jan. 2021 - 二重偏波フェーズドアレイ気象レーダを用いた2019年台風15号の3次元観測
菊池博史; 牛尾知雄; 芳原容英
Oral presentation, Japanese, 第99回日本大気電気学会, 日本大気電気学会, オンライン会場
08 Jan. 2021 - Monitoring Energetic Lightning in Southeast Asia using ELF magnetic field observations in Malaysia
Y. Hobara; H. Kikuchi; C. Gomes; A. Mohamed; M. Stock; K. Shiokawa
Poster presentation, English, VERSIM Virtual Meeting
17 Nov. 2020 - F- Layer Critical Frequency deduced from Lightning Whistlers
S.Hirai; Y.Hobara; S Kanazawa; J.L.Pinçon
Poster presentation, English, VERSIM Virtual Meeting
17 Nov. 2020 - F- Layer Critical Frequency deduced fromLightning Whistlers
S. Hirai; Y. Hobara; S. Kanazawa; J. L. Pinçon
Oral presentation, English, Versim2020, International conference
24 Mar. 2020 - Monitoring Energetic Lightning in Southeast Asia using ELF magnetic field observations in Malaysia
Y. Hobara; H. Kikuchi; C. Gomes; A. Mohamed; M. Stock; K. Shiokawa
Oral presentation, English, International conference
24 Mar. 2020 - Response of the Mesosphere and Lower Ionosphere to an Extremely Severe Cyclone "Fani" of May
S. Pal; S. Sarkar; S. K. Midya; S. K. Mondal; Y. Hobara
Oral presentation, English, Versim2020, International conference
24 Mar. 2020 - 台風 15 号および 19 号の発生から消滅までの雷特性
Teoh Che Kok; 芳原容英; 平井周; 菊池博史
Oral presentation, Japanese, 第98回日本大気電気学会, 日本大気電気学会, 静岡
10 Jan. 2020 - Evolution of total lightning activity associated with severe thunderstorms in Japan characterized by a high speed ground-based radar and meteorological satellite
Y. Hobara; H. Kikuchi; R. Aoyagi; M. Stock
Oral presentation, English, American Geophysical Union (AGU) Fall Meeting, San Francisco, International conference
09 Dec. 2019 - Lightning Applications to Natural Hazard Mitigation
Y. Hobara
Oral presentation, English, 2019 URSI-Japan Radio Science Meeting, URSI-JRSM, UEC, Tokyo, International conference
05 Sep. 2019 - Lightning Applications to Natural Hazard Mitigation
Y. Hobara
Oral presentation, Japanese, 2019 URSI-Japan Radio Science Meeting, UEC,Tokyo Japan
05 Sep. 2019 - Global Distributions of Lightning Electrical Characteristics Estimated by Optical Observation from International Space Station
R. Kitamura; Y. Hobara; H. Kikuchi; M. Sato; Y. Takahashi; T. Adachi; T. Ushio; M. Suzuki
Oral presentation, Japanese, 2019 URSI-Japan Radio Science Meeting, UEC,Tokyo Japan
05 Sep. 2019 - Characteristics of Optical Lightning Waveforms Observed by Photometers on the International Space Station Optical Observation from International Space Station
H. Kikuchi; Y. Hobara; M. Sato; T. Morimoto
Oral presentation, Japanese, 2019 URSI-Japan Radio Science Meeting, UEC,Tokyo Japan
05 Sep. 2019 - Improving F-layer Critical frequency deduced from Fractional Hop Lightning Whistlers
S. Hirai; Y. Hobara; J.L. Pincon; M. Parrot
Oral presentation, Japanese, 2019 URSI-Japan Radio Science Meeting, UEC,Tokyo Japan
05 Sep. 2019 - Detecting Ionospheric Anomalies before Earthquakes by Machine Learning Technique
K. Matsuki; Y. Hobara; H. Santosa
Oral presentation, Japanese, 2019 URSI-Japan Radio Science Meeting, UEC,Tokyo Japan
05 Sep. 2019 - ELF transient observations to mitigate damage to power grid systems
Y. Hobara
Keynote oral presentation, English, 4th International Symposium on Lightning Research (ISLR2019), Invited, Universiti Tenaga Nasional, Selangor, Malaysia, International conference
29 Aug. 2019 - 国際宇宙ステーションからの光学観測に基づく世界雷の空間分布と電気的特性に関する研究
北村隆之介; 芳原容英; 菊池博史; 佐藤光輝; 高橋幸弘; 足立透研; 牛尾知雄; 鈴木睦
Oral presentation, Japanese, 環境電磁工学研究会 (EMCJ), 電子情報通信学会
18 Jul. 2019 - Lightning Charge Moment Changes Deduced from Highly Sensitive ELF Magnetic Field Observations in Southeast Asia
Y. Hobara
Oral presentation, English, EMC Sapporo &APEMC2019, 電子情報通信学会 2019年環境電磁工学国際シンポジウム組織委員会, Sapporo, International conference
06 Jun. 2019 - 熱帯降雨観測衛星TRMMからの雷の光学観測を用いた雷の電気エネルギー導出に関する研究
平田 浩大; 芳原 容英; 菊池 博史
Oral presentation, Japanese, Japan Geoscience Union Meeting 2019, 日本地球惑星科学連合2019年大会, 千葉, Domestic conference
28 May 2019 - 雷起源ホイスラー波を用いた電離層F層電子密度の推定における精度向上の検討
平井 周; 金澤 璋吾; 芳原 容英; J. L. Pincon
Oral presentation, Japanese, Japan Geoscience Union Meeting 2019, 日本地球惑星科学連合2019年大会, 千葉, Domestic conference
28 May 2019 - 非線形自己回帰ニューラルネットワークを用いた地震に先行する下部電離層異常の検出
松木 翔; 飯淵 隼人; H. Santosa; 芳原 容英; M. Balikhin
Oral presentation, Japanese, Japan Geoscience Union Meeting 2019, 日本地球惑星科学連合2019年大会, 千葉, Domestic conference
28 May 2019 - 日本国内での豪雨に伴う雷放電を用いた降水量の推定
小川 哲也; 芳原 容英; 岩崎 博之; S. Heckman; M. Stock
Oral presentation, Japanese, Japan Geoscience Union Meeting 2019, 日本地球惑星科学連合2019年大会, 千葉, Domestic conference
28 May 2019 - Lightning applications to severe weather and power grid systems
Y. Hobara
Invited oral presentation, English, National Conference on Severe Weather (NCSW-2019), Invited, Kolkata University, Kolkata, India, International conference
17 Mar. 2019 - Lightning applications to severe weather and power grid systems, National Conference on Severe Weather
Y. Hobara
Oral presentation, English, National Conference on Severe Weather (NCSW-2019), Kolkata University, Kolkata, India, International conference
17 Mar. 2019 - Prediction of D Region Characteristics using Nonlinear System Identification Technique applied to VLF/LF Transmitter Data
Y. Hobara; H. Santosa
Invited oral presentation, English, 2019 URSI AP-Rasc, International conference
14 Mar. 2019 - Total Lightning Activities during Recent Extreme Weather Events in Japan
Y. Hobara; S. Kono; T. Ogawa; S. Heckman; M. Stock
Oral presentation, English, 2019 URSI AP-Rasc, 2019 URSI AP-Rasc, New Delhi, India, International conference
14 Mar. 2019 - Global distributions of Lightning Electrical Energy Estimated by Optical Observations from International Space Station
R. Kitamura; Y. Hobara; M. Sato; Y. Takahashi; T. Adachi; T. Ushio; M. Suzuki
Poster presentation, English, 2019 URSI AP-Rasc, 2019 URSI AP-Rasc, New Delhi, India, International conference
14 Mar. 2019 - Lightning Charge Estimation over Eastern Part of Japan by ELF and LLS Observations
Y. Hobara; R. Kitamura; T. Narita; D. Ohta; T. Tsuya
Poster presentation, English, 2019 URSI AP-Rasc, URSI AP-Rasc, New Delhi, International conference
11 Mar. 2019 - Lightning application to extreme weather
Y. Hobara
Invited oral presentation, English, 6th International Conference on Signal Processing and Integrated Networks, Invited, SPIN2019, Delhi, India, International conference
07 Mar. 2019 - 東南アジアにおける高感度ＥＬＦ帯磁場観測を用いた落雷の電気的特性の導出（初期解析結果）
芳原容英; C. Gomes; A. I. Mohamed; 塩川和夫; M. Stock; 津田卓雄
Oral presentation, Japanese, 第97回日本大気電気学会, Domestic conference
11 Jan. 2019 - 国際宇宙ステーションからの光学観測により推定された落雷電荷モーメントの全球分布
北村隆之介; 芳原容英; 菊池博史; 佐藤光輝; 高橋幸弘; 足立透; 牛尾知雄; 鈴木睦
Oral presentation, Japanese, 第97回日本大気電気学会, Domestic conference
11 Jan. 2019 - 雷の電波を観測し、地震や竜巻、宇宙転記の予測を目指す
芳原容英
Public discourse, Japanese, 目黒会北陸支部総会, 一般社団法人目黒会
17 Nov. 2018 - 電波で地球や宇宙環境を探る・予測する
芳原容英
Public discourse, Japanese, 平成30年度目黒会東海支部・総会, 目黒会東海支部
03 Nov. 2018 - Lightning application to extreme weather and power grid systems
Y. Hobara
Invited oral presentation, English, National Seminar on Innovation, Technology and Applications (SENITIA), Bengkulu, Indonesia, International conference
27 Sep. 2018 - Lightning application to extreme weather and power grid systems
Y. Hobara
Invited oral presentation, English, Seminar Nasional Inovasi, Teknologi dan Aplikasi, Univ.of Bengkulu, Indonesia, http://senitia.ft.unib.ac.id/, International conference
27 Sep. 2018 - Monitoring and prediction of Earth's environment using electromagnetic method
Y. Hobara
Oral presentation, English, Seminar Nasional Inovasi, Teknologi dan Aplikasi, Univ.of Bengkulu, Indonesia, http://senitia.ft.unib.ac.id/, International conference
27 Sep. 2018 - Monitoring and forecasting the Earth's and space environments by multi-frequency radio wave observations
Y. Hobara
Oral presentation, English, 50th Anniversary International Symposium of Center for Space Science and Radio Engineering (SSRE), Space Science and Radio Engineering, UEC
26 Jun. 2018 - Monitoring and forecasting the Earth's and space environments by multifrequency radio wave observations
Y. Hobara
Public symposium, English, 50th Anniversary International Symposium of Center for Space Science and Radio Engineering
25 Jun. 2018 - Characteristics of total lightning associated with recent hazardous weather events in Japan
Y. Hobara; S. Kono; T. Ogawa; S. Heckman; M. Stock; C. Liu
Oral presentation, English, ICAE2018, International conference
22 Jun. 2018 - Lightning characteristics with charge moment change over eastern part of Japan by ELF and LLS observations, ICAE2018, Nara, Japan
Y. Hobara; J. Yamashita; R. Murai; T. Narita; H. Mitsuzuka
Oral presentation, English, ICAE2018, International conference
22 Jun. 2018 - Statistical study of the relationship between total lightning and heavy rainfall, ICAE2018, Nara, Japan
T. Ogawa; Y. Hobara; H. Iwasaki; S. Heckman; M. Stock
Oral presentation, English, ICAE2018, International conference
22 Jun. 2018 - Gamma-ray Flash from a Winter Thunderstorm in Japan, ICAE2018, Nara, Japan
M. Stock; Z.Kawasaki; Y. Hobara; T. Ushio; D. Wang; S. Heckman; S. A. Cummer; X. Shao; J. R. Dwyer
Oral presentation, English, ICAE2018, International conference
22 Jun. 2018 - Nonlinear prediction model of ionospheric foF2 variability
H. Santosa; Y. Hobara
Oral presentation, English, Japan Geoscience Union Meeting 2018, Domestic conference
22 May 2018 - Boynton RichardPredication of ULF geomagnetic field based on nonlinear system identification approach
H. Iibuchi; H. Santosa; Y. Hobara; M. Balikhin
Oral presentation, English, Japan Geoscience Union Meeting 2018, Domestic conference
22 May 2018 - 日本国内の突風現象を伴う積乱雲におけるトータル雷の特性に関する研究
甲野槙太郎; 芳原容英; S. Heckman; M.Stock
Oral presentation, Japanese, Japan Geoscience Union Meeting 2018, Domestic conference
22 May 2018 - Accuracy verification of lightning charge moment and lightning charge height remotely estimated by ELF observations using lightning current measurements at wind turbine
村井峻; 芳原容英; 箕浦史登; 吉田遼大郎; 三塚洋明; 成田知巳; 石井勝; 斎藤幹久; 夏野大輔
Oral presentation, English, Japan Geoscience Union Meeting 2018, Domestic conference
22 May 2018 - VLF/LF帯電波の多点観測及び3次元FDTD法を用いた金環日食に伴う電波伝搬特性の解明に関する研究
金澤璋吾; 芳原容英; 安藤芳晃
Oral presentation, Japanese, Japan Geoscience Union Meeting 2018, Domestic conference
22 May 2018 - Modeling and predictions of D region characteristics using nonlinear autoregression and neural network
Y. Hobara
Invited oral presentation, English, Versim2018, Apatity, Russia, International conference
26 Mar. 2018 - Lightning electrical property deduced from high speed photometric observations from space station
Y. Hobara
Invited oral presentation, English, Versim2018, Apatity, Russia, International conference
26 Mar. 2018 - 極超長波を用いた雷関連電磁気現象の観測と応用
芳原容英
Invited oral presentation, Japanese, 研究フォーラム 電力システムに対する雷・自然災害と環境問題に関する研究, 電気学会, Domestic conference
10 Mar. 2018 - ELF帯磁界の国内2点同時観測を用いた落雷位置および電荷モーメント推定精度に関する研究
村井崚; 芳原容英; 三塚洋明; 皆川郁靖; 成田知巳; M. Stock; S. Heckman
Oral presentation, Japanese, 第96回日本大気電気学会, Domestic conference
06 Jan. 2018 - ELF帯トランジェントを用いた関東周辺における落雷電荷量推定に関する研究
小林瑞貴; 村井崚; 芳原容英; 三塚洋明; 皆川郁靖; 成田知巳
Oral presentation, Japanese, 第96回日本大気電気学会, Domestic conference
06 Jan. 2018 - DEMETER衛星で観測された雷起源ホイスラの自動抽出により推定されたF2層最大電子密度の世界空間分布
Y. Girma; 鈴木克徳; 芳原容英; M. Parrot; J. L Pincon
Oral presentation, Japanese, 第96回日本大気電気学会, Domestic conference
06 Jan. 2018 - 日本で発生した巨大ジェットに伴う下部電離層擾乱と電荷モーメントに関する研究
河内健太郎; 芳原容英; 鈴木智幸; 鴨川仁
Oral presentation, Japanese, 第96回日本大気電気学会, Domestic conference
06 Jan. 2018 - 突風現象を伴う積乱雲におけるトータル雷の特性に関する研究
甲野慎太郎; 芳原容英; S. Heckman; M. Stock; C. Liu
Oral presentation, Japanese, 第96回日本大気電気学会, Domestic conference
06 Jan. 2018 - 日本国内で観測されたトータル雷と激しい降水との相関関係の調査
小川哲也; 芳原容英; 岩崎博之; M. Stock; S. Heckman
Oral presentation, Japanese, 第96回日本大気電気学会, Domestic conference
06 Jan. 2018 - Richard Boynton, 非線形システム同定手法を用いたULF帯磁場時間変動のモデリング及び変動要因の考察
飯淵隼人; H. Santosa; 芳原容英; M. Balikhin
Oral presentation, Japanese, 第96回日本大気電気学会, Domestic conference
06 Jan. 2018 - 非線形自己回帰ニュートラルネットワークを用いた国内における下部電離層の時間変動のモデリング
岡庭章浩; H. Santosa; 芳原容英
Oral presentation, Japanese, 第96回日本大気電気学会, Domestic conference
06 Jan. 2018 - One day prediction of nighttime VLF amplitudes using nonlinear autoregression and neural network modeling
H. Santosa; Y. Hobara
Oral presentation, English, 日本地震予知学会 第４回学術講演会, 日本地震予知学会, 電気通信大学
26 Dec. 2017 - Total lightning characteristics of recent hazardous weather events in Japan
Y. Hobara; S. Kono; T. Ogawa; S. Heckman; M. Stock; C.e Liu
Oral presentation, English, American Geophysical Union (AGU) Fall Meeting, International conference
12 Dec. 2017 - Lightning charge moment changes estimated by high speed photometric observations from ISS
S. Kono; K. Suzuki; Y. Hobara; M. Sato; Y. Takahashi; T. Ushio; M. Suzuki
Oral presentation, English, American Geophysical Union (AGU) Fall Meeting, New Orleans, International conference
12 Dec. 2017 - Ashwini Kumar Sinha and Yuri Yampolski, Verification of a Schumann Resonance Inversion Method for Global Lightning Activity in Absolute Units
E. R. Williams; A. Guha; Y. Liu; R. A Boldi; E. Pracser; R. Said; G. Satori; T. Bozoki; J. Bor; M. Atkinson; C. Beggan; S. Cummer; F. Lyu; B. Fain; Y. Hobara; K. Alexander; A. Kulak; R. McCraty; J. Mlynarczyk; J. Montanya; R. C. Moore; M. Neska; P. Ortega; C. G. Price; R. Rawat; M. Sato; A. Sinha; Y. Yampolski
Oral presentation, English, American Geophysical Union (AGU) Fall Meeting, Americal Geophysical Union (AGU), New Orleans, USA, International conference
11 Dec. 2017 - 風力発電施設への着雷事例を用いたＥＬＦ帯電磁波観測により遠隔推定された落雷電荷モーメントおよび落雷電荷量推定精度の検証
村井崚; 芳原容英; 山下純平; 吉田遼大郎; 箕浦史登; 三塚洋明; 太田浩; 成田知巳
Oral presentation, Japanese, 電気学会 平成２９年度電力・エネルギー部門大会, 電気学会, 東京
06 Sep. 2017 - Spatial distributions of lightning electrical properties over estern part of Japan by ELF and LLP observations
Y. Hobara; J. Yamashita; R. Murai; T. Narita; H. Mitsuzuka
Oral presentation, English, URSI 2017 GASS, Montreal, International conference
23 Aug. 2017 - Multi step ahead prediction of nighttime VLF amplitude signal for low-mid and high-latitude paths
H. Santosa; Y. Hobara
Oral presentation, English, URSI 2017 GASS, Montreal,Canada, International conference
23 Aug. 2017 - Response of the sub-ionospheric VLF-LF signals to the major SSW event of 2009
S. Pal; Y. Hobara; S. K. Chakrabarti; P. W. Schnoor
Poster presentation, English, URSI 2017 GASS, Montreal,Canada, International conference
23 Aug. 2017 - Recent results from the Japanese total lightning network, Japan Geoscience Union Meeting 2017
S. Kono; Y. Hobara; S.Heckman; C.Liu
Oral presentation, English, Japan Geoscience Union Meeting 2017, Makuhari,Chiba
22 May 2017 - Ionospheric perturbations due to earthquakes observed simultaneously by subionospheric VLF/LF wave and GPS TEC measurements
H. Santosa; Y. Hobara; T. Tsuda; S. Srinivas
Oral presentation, English, Japan Geoscience Union Meeting 2017, Makuhari,Chiba
22 May 2017 - Statistical, study of maximum ionospheric electron density deduced from lightning whistlers obtained by DEMETER
G.Yiddidya; Y. Hobara; P. Michel
Poster presentation, English, Japan Geoscience Union Meeting 2017, Makuhari,Chiba
22 May 2017 - Improving accuracy of locations and lightning charge moment changes using multi-point simultaneous obsevations of ELF transients
R. Murai; Y. Hobara; J. Yamashita; S. Heckman
Oral presentation, English, Japan Geoscience Union Meeting 2017, Makuhari,Chiba
22 May 2017 - Accuracy Verification of Lightning Charge Moment Change Remotely Estimated by ELF Observations using Direct Lightning Charge Masurements at Wind Turbine
Y. Hobara; J. Yamashita; Y. Matsui; S. Murai; T. Narita; H. Mitsuzuka
Oral presentation, English, ISWL2017, Joetsu, Niigata, Japan, International conference
12 Apr. 2017 - Preliminary Results from total lightning observation in Japan
Y. Hobara
Oral presentation, English, The Atmospheric Global Electric Circuit (GEC), International conference
Feb. 2017 - 非線形システム同定手法を用いた下部電離層状態の予測および擾乱原因の解明に関する研究
松井優磨; H. Santosa; M. Balikhin; 芳原容英
Oral presentation, Japanese, 第95回日本大気電気学会
06 Jan. 2017 - The vertical coupling of Tsunami induced ionospheric perturbations from subionospheric VLF/LF waves and GPS TEC measurements for Tohoku earthquake
H.Santosa; S. Srinivas; T. Tsuda; Y. Hobara
Oral presentation, Japanese, 第95回日本大気電気学会
06 Jan. 2017 - 国際宇宙ステーションGLIMS ミッションにより観測された雷発光強度を用いた雷の電気的特性導出に関する研究
鈴木克徳; 柿沼遠方; 芳原容英; 佐藤光輝; 高橋幸弘; 足立透; 牛尾知雄; 河崎善一郎; 森本健志; 山崎敦; 鈴木睦; I.R.Linscott; U.S. Inan
Oral presentation, Japanese, 第95回日本大気電気学会
06 Jan. 2017 - 対流圏の雷活動と高高度電離圏の応答に関する研究
竹本未来; 芳原容英; Jean-Louis Pincon; Michel Parrot
Oral presentation, Japanese, 第95回日本大気電気学会
06 Jan. 2017 - 非線形信号処理手法を用いたULF 帯磁場変動のモデリングに関する研究
飯淵隼人; 芳原容英; 松井優磨
Oral presentation, Japanese, 第95回日本大気電気学会
06 Jan. 2017 - 激しい降水事象に伴うトータル雷の時空間変動に関する研究
小川哲也; 甲野慎太郎; 岩崎博之; 清水慎吾; 芳原容英
Oral presentation, Japanese, 第95回日本大気電気学会
06 Jan. 2017 - Multi-step Ahead Prediction of Midlatitude Daily Nighttime Subionospheric VLF Signals using NARX NN Modeling
H. Santosa; Y. Hobara; Y. Matsui
Oral presentation, English, The Irago Conference
01 Nov. 2016 - Reliability of Dual and Triple Frequency Ionosphere-free Linear Combination of GPS for Single Point Positioning
V. Satya Srinivas; Y. Hobara
Oral presentation, English, The Irago Conference
01 Nov. 2016 - Prediction of Nighttime VLF Signal Amplitude for Mid-and High-Latitude Paths
H. Santosa; Y. Hobara
Oral presentation, English, Japan Geoscience Union Meeting 2016, Makuhari,Chiba
25 May 2016 - Statistical study on the Relationship between Major Earthquakes and Lower Ionospheric Perturbations based on the Focal Mechanism and Nighttime Fluctuation Method
T. Kawano; K.Tatsuta; Y. Hobara
Oral presentation, English, Japan Geoscience Union Meeting 2016, Makuhari,Chiba
25 May 2016 - Ionospheric perturbations due to earthquakes observed simultaneously by subionospheric VLF/LF wave and GPS TEC measurements
H. Santosa; Y. Hobara; T. Tsuda; S. Srinivas
Oral presentation, English, Japan Geoscience Union Meeting 2017, Makuhari,Chiba
22 May 2016 - 日本トータル雷ネットワークを用いた極端気象の初期解析結果
芳原容英
Oral presentation, Japanese, 日本気象学会2016年度春季大会, 日本気象学会, 東京
21 May 2016 - Tatistical study of seismo-ionospheric perturbations around Japan by using VLF/LF transmitters with a focal mechanism
T. Kawano; Y. Hobara; K. Tatsuta
Oral presentation, English, European Geosciences Union General Assembly 2016, Vienna,Austria, International conference
20 Apr. 2016 - Electrical properties of lightning over northern part of Japan by using ELF and LLP observations
Y. Hobara; J. Yamashita; T. Narita; H. Mitsuzuka
Oral presentation, English, European Geosciences Union General Assembly 2016, Vienna,Austria, International conference
20 Apr. 2016 - tatistical study of seismo-ionospheric perturbations around Japan by using VLF/LF transmitters with a focal mechanism
T.Kawano; Y.Hobara; K.Tatsuta
Oral presentation, English, European Geosciences Union General Assembly 2016, Vienna,Austria, International conference
20 Apr. 2016 - ELF帯電波観測を用いた関東周辺の落雷に伴う電荷モーメントの推定と地域特性及び季節変化に関する研究
山下純平; 芳原容英; 成田知巳; 三塚洋明
Oral presentation, Japanese, 平成２８年 電気学会全国大会
16 Mar. 2016 - 極超長波(ELF)を用いた落雷電荷量の推定精度検証
成田知巳; 三塚洋明; 太田浩; 山下純平; 芳原容英; 三木貫; 齋藤幹久
Oral presentation, Japanese, 平成２８年 電気学会全国大会
16 Mar. 2016 - ミッションにより観測された雷放電の発光面積・強度とその電気的特性に関する研究
柿沼遠方; 芳原容英; 牛尾知雄; 河崎善一郎; 森本健志; 佐藤光輝; 山崎敦; 鈴木睦
Oral presentation, Japanese, 日本大気電気学会 第94回, Domestic conference
09 Jan. 2016 - 発震機構及び電波観測を用いた地震-電離層擾乱関連性の評価
河野友紀; 龍田健心; 芳原容英
Oral presentation, Japanese, 日本大気電気学会 第94回, 日本大気電気学会, 東京, Domestic conference
09 Jan. 2016 - 台湾における、VLF送信電波を用いた地震に関連する電離層擾乱の調査
小泉雅大; 龍田健心; 河野友紀; 芳原容英; C; H. Chen
Oral presentation, Japanese, 日本大気電気学会 第94回, 日本大気電気学会, 東京, Domestic conference
09 Jan. 2016 - ELF帯及び広帯域雷観測網を併用した雷放電に伴う電荷モーメントの空間分布の初期解析結 果
石井遵平; 山下純平; 芳原容英
Oral presentation, Japanese, 日本大気電気学会 第94回, 日本大気電気学会, 東京, Domestic conference
09 Jan. 2016 - 電通大トータル雷観測データを用いた国内突風現象に先行するライトニングジャンプに関する研究
熊谷悠里; 石井颯杜; 芳原容英; S. Heckman; C. Liu
Oral presentation, Japanese, 日本大気電気学会 第94回, 日本大気電気学会, 東京, Domestic conference
09 Jan. 2016 - ELF帯電波及び LLS観測による関東周辺の落雷に伴う電荷モーメントの推定と地域特性に関する研究
山下純平; 芳原容英; 成田知巳; 三塚洋明
Oral presentation, Japanese, 日本大気電気学会 第94回, 日本大気電気学会, 東京, Domestic conference
09 Jan. 2016 - The NARX Neural Network Model for Predicting Daily Nighttime VLF Amplitude NPM-CHF Path
H. Santosa; Y. Hobara
Oral presentation, Japanese, 日本大気電気学会 第94回, 日本大気電気学会, 東京, Domestic conference
09 Jan. 2016 - 日本国にて発生した竜巻に伴うトータル雷と降水特性に関する調査
甲野慎太郎; 石井颯杜; 熊谷悠里; 芳原容英; C. Liu; S. Heckman
Oral presentation, Japanese, 日本大気電気学会 第94回, 日本大気電気学会, 東京, Domestic conference
09 Jan. 2016 - 竜巻をもたらすメソサイクロンとトータル雷に関する研究
石井颯杜; 芳原容英; C. Price; E. Williams
Oral presentation, Japanese, 日本大気電気学会 第94回, 日本大気電気学会, 東京, Domestic conference
09 Jan. 2016 - DEMETER 衛星による雷起源ホイスラを用いた世界電子密度推定に関する研究
Yididya Girma; 鈴木克徳; 芳原容英; M. Parrot; J-L. Pincon
Oral presentation, Japanese, 日本大気電気学会 第94回, 日本大気電気学会, 東京, Domestic conference
09 Jan. 2016 - ロングリカバリーアーリーVLF 電波擾乱を引き起こす雷特性に関する研究
山田大開; 山下純平; 芳原容英
Oral presentation, Japanese, 日本大気電気学会 第94回, 日本大気電気学会, 東京, Domestic conference
09 Jan. 2016 - 雷嵐に対する下部電離層応答に関する統計的研究
小川尚志; 河野友紀; 松井優磨; 芳原容英
Oral presentation, Japanese, 日本大気電気学会第94回, 日本大気電気学会, 東京, Domestic conference
09 Jan. 2016 - 非線形同定手法を用いた下部電離層状態のモデリング及び予測に関する研究
松井優磨; 龍田健心; H. Santos; M. Balikhin; 芳原容英
Oral presentation, Japanese, 日本大気電気学会 第94回, 日本大気電気学会, 東京, Domestic conference
09 Jan. 2016 - Modeling of lower ionosphere and using the wave propagation theory, the computation of diurnal variations of multi-transmitter VLF signals at Antarctic station
T. Basak; Y. Hobara
Oral presentation, Japanese, 日本大気電気学会第94回, 日本大気電気学会, 東京, Domestic conference
09 Jan. 2016 - Determination of Spatio-Temporal Characteristics of D-region Electron Density during Annular Solar Eclipse from VLF Network Observations
T. Basak; Y. Hobara
Oral presentation, English, American Geophysical Union Fall Meeting, International conference
15 Dec. 2015 - Prediction of the Nighttime VLF Subionospheric Signal Amplitude by Using Nonlinear Autoregressive with Exogenous Input Neural Network
H. Santosa; Y. Hobara; M. Balikhin
Oral presentation, English, American Geophysical Union Fall Meeting, International conference
15 Dec. 2015 - Preliminary Results form the Japanese Total Lightning Network
Y. Hobara; H. Ishii; Y. Kumagai; C. Liu; S. Heckman; C. Price; E. R. Williams
Oral presentation, English, American Geophysical Union Fall Meeting, International conference
15 Dec. 2015 - Prediction of the Nighttime VLF Subionospheric Signal Amplitude by Using Nonlinear Autoregressive with Exogenous Input Neural Network Model
H. Santosa; Y. Hobara; M. Balikhin
Oral presentation, English, American Geophysical Union Fall Meeting, International conference
15 Dec. 2015 - A Statistical Study on VLF Subionospheric Perturbations Associated with Major Earthquakes: A View from Focal Mechanism
T. Kawano; K. Tatsuta; Y. Hobara
Poster presentation, English, American Geophysical Union Fall Meeting, American Geophysical Union, San Francisco, International conference
15 Dec. 2015 - Atmosphere and Ionosphere Connection as Revealed by the Network Observation of Very Low Frequency Radio Signals
S. Pal; Y. Hobara
Oral presentation, English, 2015 URSI-Japan Radio Science Meeting, Tokyo
04 Sep. 2015 - A Statistical Study of Sub-ionospheric VLF Signal Anomaly Due to Geomagnetic Storms
K. Tatsuta; Y. Hobara
Oral presentation, English, 2015 URSI-Japan Radio Science Meeting, Tokyo
04 Sep. 2015 - Statistical Spatial Distributions of Lightning with Charge Moment Changes Over Northern Area of Japan by ELF and LLS Observations
J. Yamashita; Y. Hobara
Oral presentation, English, 2015 URSI-Japan Radio Science Meeting, Tokyo
04 Sep. 2015 - Modeling and Possible Determination of D-region Ionospheric Perturbation during Annular Solar Eclipse on May 21, 2012, From VLF Signal Simulation and Multi-Propagation Path Observation From UEC-VLF Network: Preliminary Results
T. Basak; Y. Hobara
Oral presentation, English, 2015 URSI-Japan Radio Science Meeting, Tokyo
04 Sep. 2015 - A Novel Prediction for Very Low Frequency Transmitter Signal Amplitude Using NARX Neural Network
H. Santosa; Y. Hobara
Oral presentation, English, 2015 URSI-Japan Radio Science Meeting, Tokyo
04 Sep. 2015 - Electron Density Estimation by Using Simultaneous Observations of Lightning Optical Emissions and Whistlers from ISS GLIMS Mission
K. Suzuki; Y. Hobara; K. Kakinuma
Oral presentation, English, 2015 URSI-Japan Radio Science Meeting, Tokyo
04 Sep. 2015 - VHF Lightning Observations and DOA Estimation From ISS /JEM-GLIMS
T. Morimoto; H. Kikuchi; T. Ushio; M. Sato; A. Yamazak; M.Suzuki; Y. Hobara
Oral presentation, English, 2015 URSI-Japan Radio Science Meeting, Tokyo
04 Sep. 2015 - Spatial Distributions of Lightning with Charge Moment Change over northern Part of Japan by ELF and LLP Observations
Y. Hobara; J. Yamashita; T. Narita
Oral presentation, English, Asia-Pacific International Conference 2015, Nagoya,Japan, Domestic conference
25 Jun. 2015 - 地震先行下部電離層擾乱と地震の発震機構との関係
河野友紀; 龍田健心; 芳原容英
Oral presentation, Japanese, JpGU2015, 日本地球惑星科学連合, 幕張、千葉, Domestic conference
26 May 2015 - 国際宇宙ステーションGLIMSミッションにより観測された雷発光とホイスラを用いた電離層Ｆ層の電子密度推定
鈴木克徳; 柿沼遠方; 芳原容英; L. Ivan; I. Umran; 佐藤光輝; 高橋幸弘; 牛尾知雄; 河崎善一郎; 森本健志; 山崎敦; 鈴木睦
Oral presentation, Japanese, JpGU2015, 日本地球惑星科学連合, 幕張、千葉
25 May 2015 - 国内初トータルライトニングネットワークによる突風現象による雷活動の初期観測結果
熊谷悠里; 石井颯杜; 芳原容英; S. Heckman; C. Liu
Oral presentation, Japanese, JpGU2015, 日本地球惑星科学連合, 幕張、千葉, Domestic conference
25 May 2015 - Relationship between the nighttime VLF amplitude and total column ozone density:possibility of monitoring atmospheric ozone from VLF remote sensing
S. Pal; Y. Hobara
Invited oral presentation, English, 1st URSI Atlantice Radio Science Conferece (URSI AT-RASC), Invited, Spain, International conference
19 May 2015 - Estimating ionospheric property by using simultaneous observations of lightning optical emissions and whistlers from ISS GLIMS mission.
K. Suzuki; Y. Hobara; K. Kakinuma; M. Sato; Y. Takahashi; T. Ushio; T. Morimoto; A. Yamazaki; M. Suzuki; Linscott IR; Inan US
Poster presentation, English, European Geosciences Union General Assembly 2015, Vienna,Austria, International conference
16 Apr. 2015 - Severe weather detection by using Japanese Total Lightning Network
Y. Hobara; H. Ishii; Y. Kumagai; C. Liu; S. Heckman; C. Price
Oral presentation, English, European Geosciences Union General Assembly 2015, Vienna,Austria, International conference
16 Apr. 2015 - 関東周辺での落雷に伴う電荷モーメントの地域特性に関する研究
山下純平; 芳原容英; 成田知巳
Oral presentation, Japanese, 平成２７年度電気学会全国大会
26 Mar. 2015 - 極超長波を用いた雷撃電荷量推定に関する検討
成田知巳; 山口 寛; 太田 浩; 山下純平; 芳原容英
Oral presentation, Japanese, 平成２７年度電気学会全国大会
26 Mar. 2015 - VLF/LF帯送信局電波の振幅及び位相情報を用いた地震に伴う下部電離層擾乱の位置・空間スケール同定に関する研究
龍田健心; 芳原容英; T. Basak
Oral presentation, Japanese, 日本大気電気学会 第92回, 千葉大学, Domestic conference
09 Jan. 2015 - 地震の発震機構と先行する下部電離層擾乱との関係
河野友紀; 龍田健心; 芳原容英
Oral presentation, Japanese, 日本大気電気学会 第92回, Domestic conference
09 Jan. 2015 - 日本国内トータルライトニングの夏期初期観測結果と局所的気象災害との関係性
熊谷悠里; 石井颯杜; 芳原容英; S. Heckman; C. Liu
Oral presentation, Japanese, 日本大気電気学会 第92回, Domestic conference
09 Jan. 2015 - 極端気象に伴う雷放電及び降水領域の移動に関する研究
石井颯杜; 芳原容英; C. Price
Oral presentation, Japanese, 日本大気電気学会 第92回, Domestic conference
09 Jan. 2015 - 国際宇宙ステーションGLIMSミッションにより観測されたホイスラを用いた電離層F層の電子密度推定
鈴木克徳; 芳原容英; I. R. Linscott; U. S. Inan; 佐藤光輝; 高橋幸弘; 牛尾知雄; 河崎善一郎; 森本健志; 山崎敦; 鈴木睦
Oral presentation, Japanese, 日本大気電気学会 第92回, Domestic conference
09 Jan. 2015 - 大規模気象擾乱に伴う大気圏電離圏結合に関する研究
松井優磨; 芳原 容英
Oral presentation, Japanese, 日本大気電気学会 第92回, 千葉大学, Domestic conference
09 Jan. 2015 - VLF送信電波ネットワーク観測を用いた金環日食に伴う下部電離層擾乱領域の同定に関する研究
乾大輝; 芳原容英; S. Pal
Oral presentation, Japanese, 日本大気電気学会 第92回, Domestic conference
09 Jan. 2015 - 人工衛星観測による全球にわたる雷起源の電磁波特性に関する研究
阿部利之; 芳原容英; M.Parrot
Oral presentation, Japanese, 日本大気電気学会 第92回, Domestic conference
09 Jan. 2015 - JEM-GLIMSミッションにより観測された雷発光現象と落雷電荷モーメントとの関係
柿沼遠方; 芳原容英; 牛尾知雄; 河崎善一郎; 森本健志; 佐藤光輝; 山崎敦; 鈴木睦
Oral presentation, Japanese, 日本大気電気学会 第92回, Domestic conference
09 Jan. 2015 - 関東周辺での落雷に伴う電荷モーメントの地域特性に関する研究
山下純平; 芳原容英; 成田知己
Oral presentation, Japanese, 日本大気電気学会 第92回, Invited, 千葉大学, Domestic conference
09 Jan. 2015 - ELF帯電波観測を用いた落雷電荷モーメント分布のリアルタイム表示システムに関する研究
相川龍大; 山下純平; 芳原容英; 塩川和夫
Oral presentation, Japanese, 日本大気電気学会 第92回, Domestic conference
09 Jan. 2015 - Simultaneous Observations of Ionospheric Disturbances from VLF Transmitter Signals and Surface Displacements from GPS Related to Inland Earthquakes Over Japan
Y. Hobara; R. Miyake; C. Chen
Oral presentation, English, URSI GASS, URSI GASS, BEIJING, International conference
Aug. 2014 - Spatio-Temporal Characteristics of Subionospheric Perturbations Associated With Annular Solar Eclipse over Japan: Network Observations and Modeling
D. Inui; Y. Hobara
Oral presentation, English, URSI GASS, URSI GASS, BEIJING, International conference
Aug. 2014 - LF帯雷標定およびアメダスデータを用いた落雷と局所的気象擾乱との関連性に関する研究
石井颯杜; 芳原容英; C. Price
Oral presentation, Japanese, 日本大気電気学会 第91回研究発表会, 群馬大学
04 Jul. 2014 - 地磁気変動とVLF / LF 帯送信局電波伝搬異常の関連性に関する研究
龍田健心; 芳原容英; M. A. Balikhin
Oral presentation, Japanese, 日本大気電気学会 第91回研究発表会, 群馬大学
04 Jul. 2014 - Possible relation between night time VLF amplitude and total Ozone variation
S. Pal; Y. Hobara
Oral presentation, English, Society of Atmospheric Electicity of Japan
04 Jul. 2014 - Simultaneous Observations of Surface Displacements from GPS and Ionospheric Perturbations from VLF Transmitter Signals Around Major Seismic
Y. Hobara; R. Miyake; C. H. Chen
Oral presentation, English, AOGS2014, AOGS, Sapporo
Jul. 2014 - VLF Subionospheric Disturbances and Causative Lightning Properties by using Ground Observations and ISS GLIMS Mission
Y. Hobara; K .Kakinuyma; M. Sato; T. Ushio; T. morimot; A. Yamazaki; M. suzuki; M. kikuchi; Y. Takahashi; U. Inan
Oral presentation, English, AOGS2014, AOGS, Sapporo
Jul. 2014 - Deducing Locations and Charge Moment Changes of Lightning Discharges by ELF Network Observations in Japan
Y. Hobara; T. Inoue; M. Hayakawa; K. Shiokawa
Oral presentation, English, ICAE 2014, Oklahoma, International conference
16 Jun. 2014 - VLF subionospheric disturbances and electrical properties of lightning discharges observed by JEM-GLIMS mission
柿沼遠方; 芳原容英; 牛尾知雄; 佐藤光輝; 高橋幸弘; 鈴木睦
Poster presentation, Japanese, Japan Geoscience Union Meeting 2014, Domestic conference
30 Apr. 2014 - 金環日食に伴う下部電離層擾乱の時空間特性に関する研究
乾大輝; 芳原容英
Oral presentation, Japanese, Japan Geoscience Union Meeting 2014, Domestic conference
29 Apr. 2014 - ロングリカバリーVLFイベントを発生させる雷放電の電気的特性
山下純平; 芳原容英
Oral presentation, Japanese, Japan Geoscience Union Meeting 2014, Domestic conference
29 Apr. 2014 - Study on lithosphere-atmosphere-ionosphere coupling inferred from the data of GPS surface displacement and ionopheric pe
芳原容英; 三宅梨沙; C. C. Hung
Oral presentation, Japanese, Japan Geoscience Union Meeting 2014, Domestic conference
29 Apr. 2014 - VLF送信電波の振幅及び位相情報を用いた地震に伴う下部電離層擾乱の位置・空間スケール同定に関する研究
龍田健心; 芳原容英
Poster presentation, Japanese, Japan Geoscience Union Meeting 2014, Domestic conference
29 Apr. 2014 - Study on Lithosphere-Atmosphere-Ionosphere(LAIC)Coupling by Using Satellite-Ground-Based Measurements and Numerical Modeling
Y. Hobara
Invited oral presentation, English, 6th Isradynamics meeting, Invited, EIN BOKEK, International conference
16 Mar. 2014 - 電波を用いた地球環境の監視と予測
芳原容英
Public discourse, Japanese, 気象予測に関する研修会
15 Jan. 2014 - 人工衛星による電波観測を用いた世界雷領域別発生頻度および電気的特性に関する研究
阿部利之; 芳原容英; M. Parrot
Oral presentation, Japanese, 日本大気電気学会第90回研究発表会
Jan. 2014 - 地震先行ELF/ULF帯磁場異常の統計的研究
安江剛広; 芳原容英; A. Y. Schekotov
Oral presentation, Japanese, 日本大気電気学会第90回研究発表会
Jan. 2014 - Simultaneous study of ULF/VLF anomalies associated with earthquakes occurred in Japan
V. Singh; Y. Hobara; M. Hayakawa
Oral presentation, English, 日本大気電気学会第90回研究発表会
Jan. 2014 - 南極昭和基地におけるVLF帯送信電波を用いた電離層擾乱の観測可能性に関する調査
荒舩健; 芳原容英; 岡田雅樹; 山岸久雄
Oral presentation, Japanese, 日本大気電気学会第90回研究発表会
Jan. 2014 - 金環日食に伴う下部電離層擾乱の時空間特性に関する研究
乾大輝; 芳原容英
Oral presentation, Japanese, 日本大気電気学会第90回研究発表会, 東京
Jan. 2014 - Simultaneous Observations of Ionospheric Disturbances from VLF Transmitter Signals and Surface Displacements from GPS Related to Inland Earthquakes Over Japan
Y. Hobara; R. Miyake; C. Chen; M. Hayakawa
Invited oral presentation, English, American Geophysical Union, Fall Meeting 2013, International conference
Dec. 2013 - Simultaneous study of ULF/VLF anomalies associated with earthquakes occurred in Japan
Y. Hobara; V. Singh
Invited oral presentation, English, American Geophysical Union, Fall Meeting 2013, International conference
Dec. 2013 - 電通大VLF帯電波観測ネットワークを用いた金環日食に伴う下部電離層擾乱の観測及び数値解析
乾大輝; 芳原容英
Oral presentation, Japanese, 日本大気電気学会第89回研究発表会
Jul. 2013 - 地震に先行するELF帯磁場放射とULF帯磁場減少の比較および統計的研究
安江剛; 芳原容英; A. Y. Schekotov
Oral presentation, Japanese, 日本大気電気学会第89回研究会発表会
Jul. 2013 - 電磁気情報の観測による地震予測
芳原容英
Public discourse, Japanese, 非常通信セミナー, Invited, 総務省中国総合通信局, 広島市, Domestic conference
27 Jun. 2013 - Comparative study of ULF depression and ELF radiation associated with seismic activity
Y. Hobara; T. Yasue; A. Schekotov; M. Hayakawa
Oral presentation, English, Japan Geoscience Union Meeting 2013
May 2013 - VLF subionospheric disturbances and ELF transients associated with TLEs: Observations and modeling
Y. Hobara; M. Hayakawa; H. Fujii; K. Ohta
Invited oral presentation, English, IWSE-AS 2010, International Workshop on Seismo-Electromagnetics and Atmospheric Science (IWSE-AS 2010), Agra, India, International conference
Nov. 2010 - Ionospheric turbulence linked to energetic seismic events observed by DEMETER
Y. Hobara; M. Hayawaka; M. Parrot
Invited oral presentation, English, AP-RASC'10, Asia-Pacific Radio Science Conference, Taipei, International conference
Sep. 2010 - Cluster及びThemis衛星を用いた準垂直衝撃波ランプ幅の統計的研究
Y. Hobara; M. A. Balikhin; S. Walker; V. Krasnoselskikh; M. Gedalin
Oral presentation, Japanese, 大気電気学会誌,日本大気電気学会第83回研究発表会
Jul. 2010 - Characteristics of terrestrial foreshock ULF waves.
Y. Hobara; S. N. Walker; M. Balikhin; O. A. Pokhotelov; M. Dunlop; H. Nilsson; H. Rème
Invited oral presentation, English, Western Pacific Geophysics Meeting, アメリカ地球物理学会, Taipei, International conference
Jun. 2010 - Characteristics of terrestrial foreshock ULF waves.
Y. Hobara; S. N. Walker; M. Balikhin; O. A. Pokhotelov; M. Dunlop; H. Nilsson; H; e
Invited oral presentation, English, Western Pacific Geophysics Meeting, アメリカ地球物理学会, Taipei, International conference
Jun. 2010 - Statistical study of the ionospheric turbulence linked to energetic seismic
Y. Hobara; M. Suzuki; M. Hayakawa
Oral presentation, English, Japan Geoscience Union MEETING
May 2010 - VLF subionospheric disturbances and ELF transients associated with TLEs: observations and modeling
Y. Hobara
Invited oral presentation, English, Very Low Frequency Radio Waves: Theory&Observations (VELFRATO-10), S.N. Bose National Centre For Basic Sciences (DST) Indian Space Research Organization (ISRO), Kolkata, India, International conference
Mar. 2010 - Sprites over Africa during the AMMA with Multiple Electromagnetic Detections of Their Parent Lightning Flashes
Y. Hobara; E. Williams; R. Boldi; B. Russell; G. Satori; J. Bor; W. Lyons; S. Cummer; Y. Takahashi; M. Sato; C. Price; M. Hayakawa
Oral presentation, English, Japan Geoscience Union MEETING
May 2009 - JEM-GLIMS Mission
T. Ushio; M. Sato; M. Suzuki; Y. Takahashi; T. Morimoto; Y. Hobara; M. Kikuchi; A. Yamazaki; T. Abe; Z. Kawasaki
Oral presentation, English, Japan Geoscience Union MEETING
May 2009 - Characteristics of ELF waves in the ionosphere by simultaneous measurements of satellite and ground-based experiment
Y. Hobara; M. Hayakawa; M. Parrot
Oral presentation, English, Japan Geoscience Union MEETING
May 2009 - フラクタル解析とELF帯電磁波動を用いたアフリカ大規模落雷特性に関する研究
白旗克基; 芳原容英; 早川正士; ガブリエラ・サトリ; アール・ウィリアムズ
Oral presentation, Japanese, 大気電気学会誌,日本大気電気学会第80回研究発表会
2009 - Cluster observations of plasma waves in the vicinity of the terrestrial foreshock
Y. Hobara; M. Balikhin; S. Walker; O. A. Pokhotelov; M. Dunlop; H. Reme
Oral presentation, English, 大気電気学会誌,日本大気電気学会第80回研究発表会
2009 - 雷起源電磁波動の人工衛星、地上同時観測による電離層伝搬特性の導出
内田健斗; 芳原容英; 早川正士; 中村崇司; ミッシェル・パロ
Oral presentation, Japanese, 大気電気学会誌,日本大気電気学会第80回研究発表会
2009 - ELFトランジェントの同定手法の比較検討
中村崇司; 関口美菜子; 早川正; 芳原容英
Oral presentation, Japanese, 大気電気学会誌,日本大気電気学会第80回研究発表会
2009 - シューマン共振現象を用いた地球温暖化モニターに関する研究
原田匠; 芳原容英; 関口美菜子; 早川正士; 太田健次; アール・ウィリアムズ
Oral presentation, Japanese, 大気電気学会誌,日本大気電気学会第80回研究発表会
2009 - Global measurements of lightning and sprites from International Space Station: JEMGLIMS mission
M. Sato; T. Ushio; T. Morimoto; Y. Takahashi; I. Umran; Y. Hobara; M. Kikuchi; M. Suzuki; A. Yamazaki; T. Abe; K. Yoshida; Y. Sakamoto; K. Okuyama; R. Ishida; Z. Kawasaki
Oral presentation, English, Japan Geoscience Union MEETING
2009 - Current Status of the Lightning and Sprite Measurements from International Space Station
T. Ushio; M. Sato; M. Suzuki; Y. Takahashi; T. Morimoto; Y. Hobara; M. Kikuchi; A. Yamazaki; T. Abe; Z. Kawasaki
Oral presentation, English, Japan Geoscience Union MEETING
2009
Courses
- ３大学協働基礎ゼミ
The University of Electro-Communications - ３大学協働基礎ゼミ
電気通信大学 - 電磁気学第二
The University of Electro-Communications - 電磁気学第二
The University of Electro-Communications - 電磁気学第二
電気通信大学 - 大学院電磁波環境観測技術特論
The University of Electro-Communications - 基礎演習Ａ
The University of Electro-Communications - 基礎電磁気学
The University of Electro-Communications - 基礎演習Ａ
The University of Electro-Communications - 基礎演習Ａ
電気通信大学 - 波動と光
The University of Electro-Communications - 波動と光
The University of Electro-Communications - 波動と光
電気通信大学 - 物理学概論第二
The University of Electro-Communications - 大学院技術英語
The University of Electro-Communications - 情報・通信演習2
The University of Electro-Communications - 大学院電磁波環境観測技術特論
The University of Electro-Communications - 大学院電磁波環境観測技術特論
電気通信大学 - 大学院総合コミュニケーション科学
The University of Electro-Communications - 大学院総合コミュニケーション科学
電気通信大学 - 情報・通信演習2
The University of Electro-Communications - 情報・通信演習2
電気通信大学 - 物理学概論第二
The University of Electro-Communications - 物理学概論第二
電気通信大学 - 基礎電磁気学
The University of Electro-Communications - 基礎電磁気学
電気通信大学 - 大学院技術英語
The University of Electro-Communications - 大学院技術英語
電気通信大学
Research Themes
- 最先端の観測技術と数値実験の融合で明らかにする雷雲の内部構造
佐藤 陽祐; 芳原 容英; 林 修吾; 吉田 龍二; 菊池 博史; 和田 有希
日本学術振興会, 科学研究費助成事業, 北海道大学, 基盤研究(A), 24H00257
01 Apr. 2024 - 31 Mar. 2029 - Monitoring and prediction of torrential rain by radio and water vapor observations of thunderstorms
芳原 容英; 菊池 博史; 牛尾 知雄; 川口 則幸
Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research, The University of Electro-Communications, Grant-in-Aid for Scientific Research (B), 23K25950
01 Apr. 2024 - 31 Mar. 2026 - 雷嵐の複合電波観測と水蒸気観測による集中豪雨の早期監視と予測
芳原 容英; 菊池 博史; 牛尾 知雄; 川口 則幸
日本学術振興会, 科学研究費助成事業, 電気通信大学, 基盤研究(B), 23H01254
01 Apr. 2023 - 31 Mar. 2026 - 地上電波観測による高エネルギー電子降下機構の解明と地球中層大気への影響
01 Apr. 2020 - 31 Mar. 2023 - 雷嵐の電波観測と高速気象レーダ観測との融合による極端気象雷災害の監視と予測
01 Apr. 2019 - 31 Mar. 2022 - 雷嵐の電波観測と気象観測の融合が拓く、極端気象、雷災害の監視と短期予測の研究
01 Apr. 2016 - 31 Mar. 2019 - VLF電波観測による下部電離層擾乱の監視
村田学術財団, 研究者海外派遣援助
Aug. 2017 - 電磁気手法を用いた地球環境の監視と予測
芳原容英
Principal investigator
2012 - 2017 - 極域におけるＶＬＦ帯送信電波を用いた下部電離層擾乱に関する研究
芳原容英
Principal investigator
2013 - 2016 - 電磁波及び光学総合観測による冬季雷特性の解明
芳原 容英
日本学術振興会, 科学研究費助成事業, 電気通信大学, 奨励研究(A), 11750229
1999 - 1999 - Cloud-to-Ionosphere Discharge, Electromagnetic Radiation and Their Effect on Power Transmission.
HAYAKAWA Masashi; OHTA Kenji; HOBARA Yasuhide
Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research, The University of Electro-Communications, Grant-in-Aid for Scientific Research (B), It is well known that winter lightning in the Japan sea area has a significant characteristic of positive cloud-to-ground discharge (+CG), and that it has an extremely serious influence on the power transmission in the area of Hokuriku. Such +CG is recently found to trigger a strong electric field in the atmosphere, inducing red sprites (or so) and leading to the perturbation in the lower ionosphere. This work will focus on the complete understanding of this upper atmosphere discharges and the associated phenomena, and also on the effect of such discharges on the power transmission. During the winter of 1997/1998, we tried the first experiment for the Hokuriku winter lightning and the associated phenomena ; (1) optical measurement from Mt. Zao in Tahara town near Toyohashi, (2) observation of ELF transients from the upper atmosphere discharges at Moshiri in Hokkaido, and (3) VLF scattering from the lower ionospheric perturbations (by means of the NWC subionospheric signal propagation). In the first winter the optical measurement was not so good due to the insufficient preparation, but we can list the important features for other phenomena. When we compare the associated phenomena (ELF sferics and VLF scattering) for +GG and -CG, it is found that +CG could trigger ELF transients and ionospheric perturbation more often (by about twice) than for -CG.However, this difference is not so big when we assume the presence of plasma column below the lower ionosphere, which means that this kind of hypothesis of such a plasma column is questionable. During the next winter of 1998/1999, we made the successful measurement again, and we are now analyzing the data extensively. We do hope that we could obtain significant results, especially with great emphasis on the optical measurement. Finally, the coupling of such discharges on the power transmission (or transmission lines) was investigated. Then, we have obtained the voltage and current induced at the end of the transmission line by means of the transmission line model., 09450110
1997 - 1998 - Role of ULF emissions in the terrestrial electromagnetic environment
HAYAKAWA Masashi; HOBARA Yasuhide; SHIMAKURA Shin; OHTA Kenji
Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research, The University of Electro-Communications, Grant-in-Aid for international Scientific Research, Result activities have shown that the electromagnetic phenomena are becoming a very promising candidate for the short-term earthquake prediction. Among the seismo-radio emissions in a different frequency range (from DC to HF), the most promising is the ULF emission, though its history is not sufficient. In this research, we would like to accumulate the convincing data on seismo ULF emissions as many as possible, and then by using those data we will elucidate the mechanism of their generation and propagation. This research has indicated the following important findings as listed below. (1) Russian ULF sensors (torsion-type magnetometer) works very well in IZU (and Chiba) area ; especially, their sensitivity is good enough, and the data are being accumulated regularly. (2) Differential array in IZU (composed of 3 or 4 sensors) is very effective for seismo-ULF emissions, such that it increases the S/N ratio for seismo-ULF waves by 30-40dB. (3) The polarization ratio (Z/H Z vertical and H horizontal component of ULF magnetic field) is again confirmed to be effective in distinguishing seismo-ULF emission from other noises (geomagnetic pulsations). (4) ULF data for other earthquakes (Biak, Guam etc.) were analyzed. and we paid great attention to the fractal analysis. It is found that this kind of fractal analysis would be useful to investigate the large-scale characteristics of the focal zone., 09044067
1997 - 1998
