東南アジアにおける多点複合ULF電磁場観測と地震電磁気現象の解明

2008 Fiscal Year Annual Research Report

• Project/Area Number: 19403002
• Research Institution: Chiba University
• Principal Investigator: 服部 克巳 Chiba University, 大学院・理学研究科, 准教授 (60244513)
• Co-Investigator(Kenkyū-buntansha): 早川 正士 電気通信大学, 電気通信学部, 教授 (80023688) ; 湯元 清文 九州大学, 宙空環境研究センター, 教授 (20125686) ; 伊勢崎 修弘 千葉大学, 大学院・理学研究科, 教授 (60107943)
• Keywords: インドネシア / 台湾 / ULF電磁場観測点 / VLF電離層監視観測点 / 電離層擾乱 / GPSTEC / 国際研究者交流 / 海外学術

Research Abstract

地震や火山噴火等の地殻活動は時に大災害を引きおこす。減災のためには、地震・火山活動を予測することも重要であり、多角的な監視手法の確立が必要である。近年、地震や火山活動などの地殻活動に関連する様々な電磁気学的な現象が報告されており、従来の弾性学的なパラメータに加えて、地殻活動を予測するための指標的なパラメータとして有効である可能性が極めて高い。本研究では、地震に伴う電磁気現象の(1)正確な把握およびそれらの物理機構の解明、(2)地圏-大気圏-電離圏結合過程の解明、さらに、(3)地震学や衛星データとの比較をするために、電磁気環境が良好でかつ大きな地震が繰り返し発生している台湾とインドネシアにおいて、多点複合ULF電磁場観測を行うことが目的である。
平成20年度はインドネシアの観測点の強化と統計的なデータ解析を主として実施した。インドネシアでのフィールドワークとしてスマトラ島コタブミへのULF電磁場観測点の設置、ジャワ島プランプハウラトウULF電磁場観測点の観測強化等を実施した。また、データ解析ではインドネシアのGPS-TEC(電離層総電子数)について10年間(1998-2008年)解析し、M>6の地震の数日前から2週間前に電離層電子密度が有意に減少し、その空間的な広がりはかなり広がっていることを示した。
台湾関連では、東海岸の花蓮近郊の観測点のメンテナンスを行った。また、国立中央大学(中歴)と協働して地震に関連するTEC変動をより詳細に解析するために、九州大学の久住観測点に衛星ビーコン受信装置を設置した。

Research Products

• [Journal Article] SMART analysis of geomagnetic data observed in Taiwan (2009)
  • Author(s): Chen, C. H., Liu, J. Y., Yang, W. H., Yen, H. Y., Hattori, K. Lin, C. R., and Yeh, Y. H.
  • Journal Title: Physics and Chemistry of the Earth 34 Pages: 350-359
  • Peer Reviewed
• [Journal Article] A new ULF wave analysis for Seismo-Electromagnetics using CPMN/MAGDAS data (2009)
  • Author(s): Yumoto, K., Ikemoto, S., Cardinal, M. G., Hayakawa, M., Hattori, K., Liu, J. Y., Saroso, S., Ruhimat, M., Husni, M., Widart o, D., Ramos, E., D. McNamara , R. E. Otadoy, G. Yumul, R. Ebora, and N. Servando
  • Journal Title: Physics and Chemistry of the Earth 34 Pages: 360-366
  • Peer Reviewed
• [Journal Article] Co-seismic Geoelectrical Potential Changes Associated with the June 4, 2000's Earthquake (Mw 7.9) in Bengkulu (2009)
  • Author(s): Widarto, D., Mogi, T., Tanaka, Y., Nagao, T., Hattori, K., and Uyeda, S.,
  • Journal Title: Physics and Chemistry of the Earth 34 Pages: 373-379
  • Peer Reviewed
• [Journal Article] Shoreline changes and vertical displacement of the 2 April 2007 Solomon Islands earthquake Mw 8.1 revealed by ALOS PALSAR images (2009)
  • Author(s): Ashar Muda Lubis, Nobuhiro Isezaki
  • Journal Title: Physics and Chemistry of the Earth 34 Pages: 409-415
  • Peer Reviewed
• [Journal Article] ULF geomagnetic anomalous changes possibly associated with 2004-2005 Sumatra earthquakes (2009)
  • Author(s): Saroso, S., Hattori, K., Ishikaw a, H., Ida, Y., Shirogane, R., H ayakawa, M., Yumoto, K., Shio kawa, K., and Nishihashi, M.,
  • Journal Title: Physics and Chemistry of the Earth 34 Pages: 343-349
  • Peer Reviewed
• [Journal Article] S Spatial distribution of ionospheric GPS-TEC and NmF2 anomalies during the 1999 Chi-Chi and Chia-Yi Earthquakes in Taiwan (2009)
  • Author(s): Nishihashi, M., Hattori, K., Jhuang, H. K., and Liu, J. Y.
  • Journal Title: Terrestrial, Atmospheric and Oceanic Sciences (In press)
  • Peer Reviewed
• [Journal Article] Progress report on the deployment of MAGDAS (2009)
  • Author(s): Maeda, G., K. Yumoto and the MAGDAS Group
  • Journal Title: Earth Moon Planet. Pages: doi 10.1007/s 11038-008-9284-5
  • Peer Reviewed
• [Journal Article] Ionospheric perturbations related to the Miyagi-oki earthquake on 16 August 2005, as seen from Japanese VLF/LF subionospheric propagation network (2009)
  • Author(s): F. Muto, T. Horie, M. Yoshida, M. Hayakawa, A. Rozhnoi, M. Solovieva, O.A. Molchanov
  • Journal Title: Physics and Chemistry of the Earth 34 Pages: 449-455
  • Peer Reviewed
• [Journal Article] A Calibration Technique for Temperature Drift of MAGDAS Magnetom eter Data (2009)
  • Author(s): Uozumi Teiji, Yumoto K., Kita mura K., Abe S., Omoto T., and MAGDAS group
  • Journal Title: Memoirs of the Faculty of Sciences, Kyushu University, Serries D Earth and Planetary Sciences (In press)
  • Peer Reviewed
• [Journal Article] 地震電磁気研究最前線-2004年スマトラーアンダマン地震に関連する電磁気変動-(印刷中) (2009)
  • Author(s): 服部克巳
  • Journal Title: 電気学会論文誌基礎・材料・共通部門誌 28(In press)
  • Peer Reviewed
• [Journal Article] Ionospheric GPS TEC Anomalies and M>5.9 Earthquakes in Indonesia during 1993-2002 (2008)
  • Author(s): S. Saroso, J. Y. Liu, K. Hattori and C. H. Chen
  • Journal Title: Terrestrial, Atmospheric and Oceanic Sciences 19 Pages: 481-488
  • Peer Reviewed
• [Journal Article] Observation of ULF geomagnetic variations and detection of ULF emis sions associated with earthquakes: Review (2008)
  • Author(s): M. Havakawa, K. Hattori. and K. Ohta
  • Journal Title: Electrical Engineering in Japan 162 Pages: 1-8
  • Peer Reviewed
• [Journal Article] Seismo-ionospheric Anomalies Observed before the 12 May 2008 Mw7. 9 Wenchuan Earthquake (in press) (2008)
  • Author(s): Liu, J. Y., Chen, Y. I., C. H. Chen, Liu, C. Y., Chen, C. Y., Nishihashi, M., Li, J. Z., Xia, Y. Q., Oyama, K. I., Hattori, K., and Lin, C. H.
  • Journal Title: J. Geophys. Res. Pages: doi:10.1029 / 2008JA013698
  • Peer Reviewed
• [Journal Article] Statistical correlation of spectral broadening in VLF transmitter signal and low-frequency ionospheric turbulence from observation on DEMETER satellite (2008)
  • Author(s): Rozhnoi, A., Solovieva, M., Molchanov, O., Akentieva, O., Ber thelier, J.J., Parrot, M., Biagi, P.F., Havakawa, M.
  • Journal Title: Natural Hazards and Earth System Science 8 Pages: 1105-1111
  • Peer Reviewed
• [Presentation] VLF/LF radio sounding of ionospheric perturbations associated with earthquakes and their possible mechanism (Invieted) (2009)
  • Author(s): Masashi Havakawa
  • Organizer: 2009 International Workshop on Validation of Earthquake Precursors by Satellite, Terrestrial and other Observations (VESTO):Case studies of the recent Asian events
  • Place of Presentation: Chiba, Japan
  • Year and Date: 20090326-28
• [Presentation] A Case Study of ULF Anomaly Associated with the Sumatra-Andaman Earthquake on Dec. 26, 2004 (Invited) (2009)
  • Author(s): K. Yumoto, M. G. Cardinal, K. Shiokawa, M. Ruhimat, and S. Saroso
  • Organizer: 2009 International Workshop on Validation of Earthquake Precursors by Satellite, Terrestrial and other Observations (VESTO):Case studies of the recent Asian events
  • Place of Presentation: Chiba, Japan
  • Year and Date: 20090326-28
• [Presentation] Seismo-Electromagnetic phenomena possibly associated with the 2004 Sumatra-Andaman earthquake (Invited) (2009)
  • Author(s): Hattori, K
  • Organizer: 2009 International Workshop on Validation of Earthquake Precursors by Satellite, Terrestrial and other Observations (VESTO):Case studies of the recent Asian events
  • Place of Presentation: Chiba, Japan
  • Year and Date: 20090326-28
• [Presentation] Multi sensor approach of validating EM atmospheric signals associated with major earthquakes. Case studies for the recent 2004-2008 Asian events. (Invited) (2009)
  • Author(s): Dimitar Ouzounov, Sergey Pulinets, Katsumi Hattori, Tiger Jann-Yenq Liu, Michel Parrot, Menas Kafatos, Shahid Habib, Fritz Policelli, and Patrick Taylor
  • Organizer: 2009 International Workshop on Validation of Earthquake Precursors by Satellite, Terrestrial and other Observations (VESTO):Case studies of the recent Asian events
  • Place of Presentation: Chiba, Japan
  • Year and Date: 20090326-28
• [Presentation] Variation of radioactive atmospheric ion concentration associated with large earthquakes (Invieted) (2008)
  • Author(s): Hattori, K., Wadatsumi, K., Furuya, R., Yada, N., Yamamoto, I Ninagawa, K., Ideta, Y., Nishihashi, M.
  • Organizer: American Geophysical Union Fall Meeting
  • Place of Presentation: San Francisco, USA
  • Year and Date: 20081215-19
• [Presentation] Early Warning of Landslides Based on Landslide Indoor Experiments (Invited) (2008)
  • Author(s): Hattori, K., Kohno, H., Tojo, Y , Terajima, T., and Ochiai, H
  • Organizer: The First Landslide Forum
  • Place of Presentation: Tokyo, Japan
  • Year and Date: 20081118-21
• [Presentation] Detection of small ULF electromagnetic changes: signals possibly generated under the ground (Invited) (2008)
  • Author(s): Hattori, K.
  • Organizer: 2nd International Workshop on Space and Lithosphere Environment Changes in Asia (IWSLEC-2)
  • Place of Presentation: Tsukuba, Japan
  • Year and Date: 20081113-14
• [Presentation] MAGDAS Projects at SERC for Litho-Space Weather (Invited) (2008)
  • Author(s): Yumoto, K., and MAGDAS Group
  • Organizer: 2nd International Workshop on Space and Lithosphere Environment Changes in Asia (IWSLEC)
  • Place of Presentation: Tsukuba, Japan
  • Year and Date: 20081113-14
• [Presentation] ULF electromagnetic changes possibly associated with crustal activity (Invited) (2008)
  • Author(s): Hattori. K.
  • Organizer: 33rd Indonesian Association of Geophysics Annual Convention and Exhibition
  • Place of Presentation: Bandung, Indonesia
  • Year and Date: 20081103-05
• [Presentation] Space and lithosphere environment changes in Indonesia, (Invited)8th SCA Conference (2008)
  • Author(s): Yumoto, K., H. Kawano, A. Yo shikawa, G. Maeda, M., K. Hattori M. Husin, S. Saroso, D. Widarto
  • Organizer: 8th SCA Conference
  • Place of Presentation: Qingdao, China
  • Year and Date: 2008-05-28
• [Presentation] New frontiers for electromagnetic monitoring of seismic active areas (Invieted) (2008)
  • Author(s): K. Hattori.
  • Organizer: Ciclo di incontri sulle attivita del CNR in Val d Agri: le infrastrutture di ricerca e le collaborazioni internazionali
  • Place of Presentation: Marsico Nuovo, Italy
  • Year and Date: 2008-04-21
• [Book] 房総半島の地学散歩-海から山へ(第1巻)第7章分担執筆(服部克巳) (2008)
  • Author(s): 宮内崇裕編
  • Total Pages: 83
  • Publisher: 千葉日報社
• [Book] 地球環境とノイズの意外な関係〜地震、大地、宇宙の声を聞く〜 (2008)
  • Author(s): 早川正士
  • Total Pages: 200
  • Publisher: 技術評論社