*Satoshi Shimizu^1,2, Hikaru Iwamaru^1,2, Nobukazu Seama^6,1, Tetsuo Matsuno^1,6, Hiroshi Ichihara^3,1, Mamoru Sano^1,2, Hiroko Sugioka^6,1, Kazuo Nakahigashi^5,1, Yojiro Yamamoto⁴, Kimihiro Nishimura⁶, Yuka Furukawa⁶, Misaki Horiuchi⁶, Toki Hirose⁷, Yasutomo Seto⁷, Yoshiyuki Tatsumi^1,6 (1.Ocean-Bottom Exploration Center, Kobe University, 2.Nippon Marine Enterprises, Ltd., 3.Earthquake and Volcano Research Center Graduate School of Environmental Studies, Nagoya University, 4.R&D Center for Earthquake and Tsunami, Japan Agency for Marine-Earth Science and technology, 5.Department of Marine Resources and Energy, Tokyo University of Marine Science and Technology, 6.Department of Planetology, Graduate School of Science, Kobe University, 7.Department of Planetology, Faculty of Science, Kobe University)