*Yukihiro Nakatani¹, Hirotsugu Yanagida¹, Hiroshi Yakiwara¹, Shuichiro Hirano¹, Yusuke Yamashita², Takeshi Matsushima³, Kazuo Nakahigashi⁴, Masanao Shinohara⁵ (1.Nansei-Toko Observatory for Earthquakes and Volcanoes, Kagoshima University, 2.Disaster Prevention Research Institute, Kyoto University, 3.Institute of Seismology and Volcanology, Kyushu University, 4.Tokyo University of Marine Science and Technology, 5.Earthquake Research Institute, the University of Tokyo)

*Yusuke Yamashita¹, Shukei Ohyanagi², Yasunori Sawaki², Yukihiro Nakatani³, Hiroshi Yakiwara³, Yoshihiro Ito¹, Masanao Shinohara⁴ (1.Disaster Prevention Research Institute, Kyoto University, 2. Graduate School of Science, Kyoto University, 3.Nansei-Toko Observatory for Earthquakes and Volcanoes, Kagoshima University, 4.Earthquake Research Institute, the University of Tokyo)

*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)

Tatsuya Mizuta¹, *Tomomi Okada¹, Martha Savage², Ryota Takagi¹, Keisuke Yoshida¹, Shinichi Sakai³, Kei Katsumata⁴, Mako Ohzono^4,3, Masahiro Kosuga⁵, Takuto Maeda⁵, Yoshiko Yamanaka⁶, Hiroshi Katao⁷, Takeshi Matsushima⁸, Hiroshi Yakiwara⁹, Takashi NAKAYAMA¹, Satoshi Hirahara¹, Toshio Kono¹, Toru Matsuzawa¹, Group for the aftershock observations of the 2011 off the Pacific coast of Tohoku Earthquake (1.Research Center for Prediction of Earthquakes and Volcanic Eruptions, Graduate School of Science, Tohoku University, 2.Victoria University of Wellington, 3.ERI, University of Tokyo, 4.Hokkaido University, 5.Hirosaki University , 6.Nagoya University, 7.DPRI, Kyoto University, 8.Kyushu University, 9.Kagoshima University)