*Takuya Echigo¹, Yoichiro Saito², Mitsuyoshi Kimata³, Masahiro Shimizu³, Norimasa Nishida⁴, Shigeru Takizawa⁵ (1.Faculty of International Resource Sciences, Akita University, 2.Master's Program in Science and Engineering, University of Tsukuba, 3.Doctoral Program in Earth Evolution Sciences, Graduate School of Life and Environmental Sciences, University of Tsukuba, 4.Chemical Analysis Division, Research Facility Center for Science and Technology, University of Tsukuba, 5.National Research Institute for Earth Science and Disaster Prevention)

*Shiqing Xu¹, Eiichi Fukuyama¹, Futoshi Yamashita¹, Kazuo Mizoguchi², Shigeru Takizawa¹, Hironori Kawakata³ (1.Nat'l Res. Inst. Earth Sci. Disas. Prev., 2.Centr. Res. Inst. Elect. Pow. Ind., 3.Ritsumeikan University)

*Eiichi Fukuyama¹, Futoshi Yamashita¹, Shiqing Xu¹, Kazuo Mizoguchi^2,1, Shigeru Takizawa¹, Hironori Kawakata^3,1 (1.National Research Institute for Earth Science and Disaster Prevention, 2.Central Research Institute of Electric Power Industry, 3.Ritsumeikan Univ.)

*Futoshi Yamashita¹, Eiichi Fukuyama¹, Shiqing Xu¹, Kazuo Mizoguchi², Shigeru Takizawa¹, Hironori Kawakata³ (1.National Research Institute for Earth Science and Disaster Prevention, 2.Central Research Institute of Electric Power Industry, 3.Ritsumeikan University)

*Yushi Tsujimura¹, Hironori Kawakata¹, Eiichi Fukuyama², Futoshi Yamashita², Shiqing Xu², Kazuo Mizoguchi^2,3, Shigeru Takizawa², Shiro Hirano¹ (1.Ritsumeikan University, 2.NIED, 3.CRIEPI)

*Futoshi Yamashita¹, Eiichi Fukuyama¹, Kazuo Mizoguchi², Shigeru Takizawa¹, Shiqing Xu¹, Hironori Kawakata³ (1.National Research Institute for Earth Science and Disaster Prevention, 2.Central Research Institute of Electric Power Industry, 3.Ritsumeikan University)