日本地球惑星科学連合2018年大会

講演情報

[EE] Eveningポスター発表

セッション記号 M (領域外・複数領域) » M-IS ジョイント

[M-IS03] Interdisciplinary studies on pre-earthquake processes

2018年5月24日(木) 17:15 〜 18:30 ポスター会場 (幕張メッセ国際展示場 7ホール)

コンビーナ:服部 克巳(千葉大学大学院理学研究科)、劉 正彦(国立中央大学太空科学研究所)、Ouzounov Dimitar(Center of Excellence in Earth Systems Modeling & Observations (CEESMO) , Schmid College of Science & Technology Chapman University, Orange, California, USA、共同)、Qinghua Huang(Peking University)

[MIS03-P03] Possible geomagnetic Sq abnormal related to great earthquake

*Xiaocan Liu1,2Katsumi Hattori2,3Peng Han4 (1.Institute of geophysics China Earthquake Administrition、2.Graduate School of Science, Chiba University, Chiba, Japan、3. Center for Environmental Remote Sensing, Chiba University, Chiba, Japan、4.Department of Earth and Space Sciences, Southern University of Science and Technology, ShenZhen, China)

キーワード:geomagnetic Sq, abnormal, great earthquake

At about 130°E to 150°E longitude sector, using 20 geomagnetic observatories absolute minutely xyz- three components data from 2009 to 2012, we detect the possible abnormal of geomagnetic solar quiet variation (Sq) related to the great Tohoku Mw9.0 earthquake, shocked at 11th Mar.2011, firstly, by NOC analyzing we pick out Sq variation from observation, then by Spheric Harmonic Analyzing (SHA), we depart the inner and external equivalent currents Je and Ji, well as the two parts model geomagnetic field Be and Bi, as the results, Je and Ji, well as the deviations ΔJe and ΔJi, are distorted in epicenter area at two geomagnetic quiet days of 27th and 23th in Jan. 2011, namely two months before the earthquake, and the x components phase direction changed for MMB ESA KNY OKI stations, besides the enlarged magnitudes at the two quiet days (23th and 27th), especially the different pattern of OKI at 27th, as double maximum of pre-noon and after-noon variation appeared.