Quasi-Static Stress Change Around Mount Fuji Region Due to Tohoku Mega-Thrust Earthquake
Eisuke Fujita*, Tomofumi Kozono**, Norio Toda***,
Aiko Kikuchi***, and Yoshiaki Ida***
*National Research Institute for Earth Science and Disaster Prevention, 3-1 Tennodai, Tsukuba, Ibaraki 305-0006, Japan
**Department of Geophysics, Graduate School of Science, Tohoku University, 6-3 Aramaki-Aza-Aoba, Aoba-ku, Sendai, Miyagi 980-8578, Japan
***Advance Soft Corporation, 4-3 Kandasurugadai, Chiyoda-ku, Tokyo 101-0062, Japan
The 2011 Tohoku mega-thrust earthquake caused huge crustal deformation over a wide are of Mainland Japan. Many mega-thrust earthquakes worldwide have triggered volcanic eruptions nearby, and it is assumed that stress changes due to the Tohoku earthquake resulted in a perturbation to the magma system. The objectives of our study is to evaluate this perturbation quantitatively and to analyze the mechanism of the interaction between mega-thrust earthquakes and volcanic eruptions. This paper focuses on quasi-static stress change due to viscous relaxation of a source region and the surrounding area.
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