Japan Geoscience Union Meeting 2018

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[EE] Oral

M (Multidisciplinary and Interdisciplinary) » M-IS Intersection

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

Thu. May 24, 2018 9:00 AM - 10:30 AM A09 (Tokyo Bay Makuhari Hall)

convener:Katsumi Hattori(Department of Earth Sciences, Graduate School of Science, Chiba University), Jann-Yenq Liu(Institute of Space Science, National Central University, Taiwan), Dimitar Ouzounov(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), Chairperson:Ouzounov Dimitar, Liu Jann-Yenq(National Central University, Taiwan)

10:00 AM - 10:15 AM

[MIS03-05] Principle component analysis of geomagnetic data associated with the 2011 Tohoku earthquake (Mw 9.0)

★Invited Papers

*Peng Han1, Katsumi Hattori2, Yuanyuan Zhou1, Ying Chang1 (1.Southern University of Science and Technology, Shenzhen, China, 2.Chiba University, Chiba, Japan)

Keywords:Principle component analysis, geomagnetic data, the 2011 Tohoku earthquake

The seismo-magnetic phenomena associated with the 2011 Tohoku earthquake have been reported in a number of previous studies. To verify the geomagnetic diurnal variation changes and investigate absolute geomagnetic field variations related to this mega event, a principle component analysis (PCA) has been applied to the geomagnetic data observed in Japan. The PCA method enables one to decompose observations into different components which are orthogonal to each other and may originate from different sources. Thus it may be useful in revealing regional seimo-magnetic signals by eliminating the contributions of common global sources. The detailed results will be shown in our presentation.