*Eiichi Fukuyama^1,2, Futoshi Yamashita², Shiqing Xu³, Kazuo Mizoguchi^4,2, Shigeru Takizawa², Hironori Kawakata^5,2 (1.Kyoto University, 2. National Research Institute for Earth Science and Disaster Resilience, 3.Southern University of Science and Technology, 4.Central Research Institute of Electric Power Industry, 5.Ritsumeikan University)