*Kiyokazu Oohashi¹, Makoto Otsubo², Satoshi Matsumoto³, Kenta Kobayashi⁴, Katsushi Sato⁵, Takuya NISHIMURA⁶ (1.Graduate School of Sciences and Technology for Innovation, Yamaguchi University, 2.Geological Survey of Japan, AIST, 3.Faculty of Science, Kyushu University, 4.Department of Geology, Faculty of Science, Niigata University, 5.Graduate School of Science, Kyoto University, 6.Disaster Prevention Research Institute, Kyoto University)

*Kenta Kobayashi¹, Keiji Ogashiwa¹ (1.Department of Geology, Faculty of Science, Niigata University)