*Mari Hamahashi¹, Hironori Otsuka¹, Yoshiaki Suzuki², Jun Arimoto², Yuzuru Yamamoto^1,3, Nobukazu Seama^1,3, Stephen Bowden^4,1, Tetsuo Matsuno¹, Hiroko Sugioka^1,3, Satoshi Shimizu^1,5, Hikaru Iwamaru^1,5, Mamoru Sano^1,5, Keita Suzuki^1,5, Katsuya Kaneko^1,3, Kazuo Nakahigashi⁶, Yoshiyuki Tatsumi¹ (1.Kobe University, Ocean-Bottom Exploration Center, 2.Geological Survey of Japan, National Institute of Advanced Industrial Science and Technology, 3.Department of Planetology, Graduate School of Science, Kobe University, 4.School of Geosciences, University of Aberdeen, 5.Nippon Marine Enterprises, Ltd., 6.School of Marine Resources and Environment, Tokyo University of Marine Science and Technology)

*Yojiro Yamamoto¹, Aki Ito¹, Yasushi Ishihara¹, Masayuki Obayashi¹, Satoru Tanaka¹, Haruhisa Nakamichi², Hiroshi Yakiwara³, Yukihiro Nakatani³, Hiroko Sugioka^4,5, Hironori Otsuka⁴, Tetsuo Matsuno⁴, Nobukazu Seama^5,4 (1.Japan Agency for Marine-Earth Science and Technology, 2.Sakurajima Volcano Research Center, Disaster Prevention Research Institute, Kyoto University, 3.Nansei-Toko Observatory for Earthquakes and Volcanoes, Kagoshima University, 4.Kobe Ocean-Bottom Exploration Center (KOBEC), 5.Department of Planetology, Kobe University)

*Hayato Nakamura¹, Hiroshi Ichihara¹, Maki Hata², Noriko Tada³, Tada-nori Goto⁴, Tetsuo Matsuno⁵, Makoto Uyeshima² (1.Graduate school of environmental studies, Nagoya University, 2.Earthquake Research Institute, the University of Tokyo, 3.Japan Agency for Marine-Earth Science and Technology, 4.Graduate School of Life Science, University of Hyogo, 5.Kobe Ocean Bottom Exploration Center, Kobe University)