*Kiyoshi Yomogida¹, Hidekatsu Masuda², Takahiro Shiina³, Kei Katsumata⁴ (1.Department of Earth and Planetary Dynamics, Graduate School of Science, Hokkaido University, 2.Earth and Planetary Dynamics, Faculty of Natural History Sciences, Graduate School of Science, Hokkaido University, 3.National Institute of Advanced Industrial Science and Technology, 4.Institute of Seismology and Volcanology, Hokkaido University)

*Masahiro Shimazaki¹, Noriko Tsumura² (1.Graduate School of Science and Engineering, Chiba University, 2.Graduate School of Science, Chiba University)

*Ryo Ito¹, Takeshi Hashimoto¹, Tomohiro Inoue¹, Makoto Uyeshima², Hiroshi Ichihara³, Yusuke Yamaya⁴ (1.Graduate School of Science, Hokkaido University, 2.Earthquake Research Institute, The University of Tokyo, 3.Graduate school of environmental studies, Nagoya University, 4.National Institute of Advanced Industrial Science and Technology)

*Tatsuya Mizuta¹, Tomomi Okada¹, Martha Savage², Ryota Takagi¹, Keisuke Yoshida¹, Shin'ichi Sakai³, Mako Ohzono^3,9, Masahiro Kosuga⁴, Yoshiko Yamanaka⁵, Hiroshi Katao⁶, Takeshi Matsushima⁷, Hiroshi Yakiwara⁸, 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 Univ., 2.Victoria University of Wellington, 3.Tokyo Univ., 4.Hirosaki Univ., 5.Nagoya Univ., 6.kyoto univ., 7.kyushu Univ., 8.Kagoshima Univ., 9.Hokkaido Univ.)

*Akio Katsumata¹ (1.Faculty of Sustainable Design, University of Toyama)

*Yasunori Sawaki¹, Takuo Shibutani², Yihuan Ruan¹, Yoshihiro Ito² (1.Graduate School of Science, Kyoto University , 2.Disaster Prevention Research Institute, Kyoto University)

*Azusa Shito¹ (1.Okayama University of Science)

*Yanxue Ma¹, Kimihiro Mochizuki¹, Rie Nakata¹, Seiichi Miura², Yasuyuki Nakamura², Ryuta Arai², Gou Fujie², Yuka Kaiho², Shuichi Kodaira² (1.Earthquake Research Institute, University of Tokyo, 2.Japan Agency for Marine-Earth Science and Technology)

*Yuka Kaiho¹, Seiichi Miura¹, Ayako Nakanishi¹, Tetsuo No¹, Kaoru Takizawa¹, Yasuyuki Nakamura¹, Gou Fujie¹, Koichiro Obana¹, Shuichi Kodaira¹ (1.Japan Agency for Marine-Earth Science and Technology)