Seismo-Electromagnetic Study based on multiple ULF-EM stations in South East Asia

2009 Fiscal Year Final Research Report

• Project/Area Number: 19403002
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 海外学術
• Research Field: Natural disaster science
• Research Institution: Chiba University
• Principal Investigator: HATTORI Katsumi Chiba University, 大学院・理学研究科, 教授 (60244513)
• Co-Investigator(Kenkyū-buntansha): YUMOTO Kiyohumi 九州大学, 宙空環境県境センター, 教授 (20125686) ; HAYAKAWA Masashi 電気通信大学, 先端ワイヤレスコミュニケーションセンター, 特任教授 (80023688) ; ISEZAKI Nobuhiro 千葉大学, 大学院・理学研究科, 教授 (60107943)
• Co-Investigator(Renkei-kenkyūsha): SATO Toshinorim 千葉大学, 大学院・理学研究科, 教授 (70222015) ; KAMOGAWA Masashi 東京学芸大学, 教育学部, 助教 (00329111) ; DJEDI Widarto インドネシア科学院地質工学研究センター, 主任研究員 ; SARMOKO Saroso インドネシア航空宇宙局, 主任研究員 ; YURI Kopytenko ロシアIZMIRAN, サンクトペテルブルグ支所, 支所長 ; MICHEL Parrot フランス国立物理化学環境研究所, 主任研究員 ; 劉 正彦 台湾国立中央大学, 太空研究所, 教授 ; 陳 玉英 台湾国立中央大学, 統数学院, 教授 ; 蔡 義本 台湾国立中央大学, 地球物理学院, 教授
• Project Period (FY): 2007 – 2009
• Keywords: 地震電磁気現象 / ULF電磁場観測 / VLF電離層監視 / GPSTEC / 電離層擾乱 / 海外学術 / インドネシア / 台湾

Research Abstract

In order to mitigate geohazard of large earthquakes with using electromagnetic phenomena, we have installed some ULF geoelecromagnetic sensors and VLF receivers in Indonesia and Taiwan, where there are less artificial noises. Not only ULF and VLF, but also GPS-TEC data have been analyzed in this project to study the lithosphere-atmosphere-ionosphere coupling. The most important finding in this project is significant decrease of GPS-TEC around geomagnetic equator 3-10 days before the earthquake with M>6 (Indonesia, Taiwan, and China regions) in statistics and a vast spatial extent of ionospheric anomaly, which is greater than 1000km.

Research Products

• [Journal Article] 地震電磁気研究最前線-2004年スマトラ-アンダマン地震に関連する電磁気変動- (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 129-A Pages: 345-351
  • Peer Reviewed
• [Journal Article] 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., Liu, J. Y.
  • Journal Title: Terrestrial, Atmospheric and Oceanic Sciences 20 Pages: 779-789
  • Peer Reviewed
• [Journal Article] Seismoionospheric GPS total electron content anomalies observed before the 12 May 2008 Mw7.9 Wenchuan earthquake, Journal of Geophysical Research A : Space Physics, 114 (2009)
  • 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., Lin, C. H.
  • Journal Title: A04320, doi:10.1029 /2008JA013698 114
  • Peer Reviewed
• [Journal Article] ULF geomagnetic anomalous changes possibly associated with 2004-2005 Sumatra earthquakes (2009)
  • Author(s): Saroso, S., Hattori, K., Ishikawa, H., Ida, Y., Shirogane, R., Hayakawa, M., Yumoto, K., Shiokawa, K., Nishihashi, M.
  • Journal Title: Physics and Chemistry of the Earth 34 Pages: 343-349
  • 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., M. Solovieva, O. Molchanov, O. Akentieva, J. J. Berthelier, M. Parrot, P. F. Biagi, M. Hayakawa
  • Journal Title: Natural Hazards and Earth System Science 8 Pages: 1105-1111
  • Peer Reviewed
• [Presentation] Electromagnetic phenomena possibly associated with the 2004 Sumatra-Andaman earthquake (2009)
  • Author(s): Hattori, K.
  • Organizer: Asia Oceania Geosciences Society 2009
  • Place of Presentation: SUNTEC, Singapore (Invited)
  • Year and Date: 20090811-20090815
• [Book] Electromagnetics in Seismic and Volcanic Areas (Proceedings of Bilateral Seminar Italy-Japan, July 25-27, 2007) (2008)
  • Author(s): Hattori, K., Telesca, L., Editors
  • Total Pages: 226
  • Publisher: Yuubunsya Pub.