*Yuichi Nishimura¹, Tetsuya Shinozaki², Takashi Chiba³, Purna Sulastya Putra⁴ (1.Graduate School of Science, Hokkaido University, 2.Center for Research in Isotopes and Environmental Dynamics (CRiED) University of Tsukuba, 3.Faculty of Bioresource Sciences, Akita Prefectural University, 4.Research Center for Geotechnology, Indonesian Institute of Sciences (LIPI))

*Erick Velasco R.¹, Kazuhisa Goto², Daisuke Sugawara³, Yuichi Nishimura⁴, Takahiro Shinohara¹, Takashi Chiba⁵ (1.Earth Science Department, Graduate Faculty of Science, Tohoku University, 2.Department of Earth and Planetary Science, Graduate School of Science, the University of Tokyo, 3.Museum of Natural and Environmental History, Shizuoka, 4.Institute of Seismology and Volcanology, Graduate School of Science, Hokkaido University, 5.Faculty of Bioresource Sciences, Akita Prefecture University.)

*Takashi Chiba¹, Yuichi Nishimura² (1.Faculty of Bioresource Sciences, Akita Prefectural University, 2.Institute of Seismology and Volcanology, Faculty of Science, Hokkaido University)

*Yuichi Nishimura¹, Purna Sulastya Putra², Septriono Hari Nugroho², Eko Yulianto², Takashi Chiba³ (1.Graduate School of Science, Hokkaido University, 2.Research Center for Geotechnology, Indonesian Institute of Sciences (LIPI), 3.Faculty of Bioresource Sciences, Akita Prefectural University)

*Yuichi Nishimura¹, Alexander Shishkin², Yasuhiro Takashimizu³, Daisuke Sugawara⁴, Takashi Ishizawa⁵, Koichiro Tanigawa⁶ (1.Graduate School of Science, Hokkaido University, 2.Institute of Marine Geology and Geophysics, Russian Academy of Sciences, 3.Faculty of Education, Niigata University, 4.Museum of Natural and Environmental History, Shizuoka, 5.International Research Institute of Disaster Science, Tohoku University, 6.The National Institute of Advanced Industrial Science and Technology )

*Takashi Ishizawa¹, Yuichi Nishimura² (1.International Research Institute of Disaster Science, Tohoku University, 2.Institute of Seismology and Volcanology, Hokkaido University)