*Yukihiro Nakatani¹, Hiroshi Yakiwara¹, Shuichiro Hirano², Reiji Kobayashi², Hiroki Miyamachi², Shigeru Nakao², Yusuke Yamashita³, Kazunari Uchida⁴, Takeshi Matsushima⁴, Hiroshi Shimizu⁴, Kazuo Nakahigashi⁵, Tomoaki Yamada⁶, Hideji Abe⁷, Masanao Shinohara⁷ (1.Nansei-Toko Observatory for Earthquakes and Volcanoes, Kagoshima University, 2.Graduate School of Science and Engineering, Kagoshima University, 3.Disaster Prevention Research Institute, Kyoto University, 4.Institute of Seismology and Volcanology, Faculty of Science, Kyushu University, 5.Tokyo University of Marine Science and Technology, 6.Japan Meteorological Agency, 7.Earthquake Research Institute, the University of Tokyo)

*Tatsuya Mizuta¹, Tomomi Okada¹, Martha K Savage², Ryota Takagi¹, Keisuke Yoshida¹, Hiroshi Yakiwara³, Takeshi Matsushima⁴, Hiroshi Katao⁵, Yoshiko Yamanaka⁶, Masahiro Kosuga⁷, Kei Katsumata⁸, Mako Ohzono⁸, Takashi NAKAYAMA¹, Satoshi Hirahara¹, Toshio Kono¹, Toru Matsuzawa¹, Group for the aftershock observations of the 2011 off the Pacific coast of Tohoku Earthquake (1.Tohoku University , 2.Victoria University of Wellington, 3.Kagoshima University, 4.kyushu University, 5.Kyoto University, 6.Nagoya University, 7.Hirosaki University, 8.Hokkaido University)

*Ayaka Tagami¹, Tomomi Okada¹, Shin'ichi Sakai², Mako Ohzono³, Kei Katsumata³, Masahiro Kosuga⁴, Yoshiko Yamanaka⁵, Hiroshi Katao⁶, Takeshi Matsushima⁷, Hiroshi Yakiwara⁸, Takashi NAKAYAMA¹, Satoshi Hirahara¹, Toshio Kono¹, Shu'ichiro Hori¹, 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.Earthquake Research Institute, University of Tokyo, 3.Institute of Seismology and Volcanology, Graduate School of Science, Hokkaido University, 4.Graduate School of Science and Technology, Hirosaki University, 5.Graduate School of Encironmental Studies, University of NAGOYA, 6.Research Center for Earthquake Prediction, Disaster Prevention Research Institute, Kyoto University, 7.Institute of Seismology and Volcanology, Faculty of Sciences, Kyushu University, 8.Nansei-toko Observatory for Earthquakes and Volcanoes, Kagoshima University)

*Takeshi Tameguri¹, Hiroshi Yakiwara², Masato Iguchi¹, Tomoki Tsutsui¹ (1.Sakurajima Volcano Research Center,Disaster Prevention Research Institute, Kyoto University, 2.Nansei-toko Observatory for Earthquakes and Volcanoes, Kagoshima University)