*Ryota Takagi¹, Akira Ishigami¹, Genti Toyokuni¹, Ryosuke Azuma¹, Mare Yamamoto¹ (1.Research Center for Prediction of Earthquakes and Volcanic Eruptions, Graduate School of Science, Tohoku University)

*Tomoya Takano^1,2, Florent Brenguier¹, Pierre Boue¹, Ryota Takagi³, Kaoru Sawazaki⁴, Tetsuya Takeda⁴, Yosuke Aoki², Kiwamu Nishida² (1.Institut des Sciences de la Terre, Univ. Grenoble Alpes, 2.Earthquake Research Institute, The University of Tokyo, 3.Research Center for Prediction of Earthquakes and Volcanic Eruptions, Graduate School of Science, Tohoku University, 4.NIED)

*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)

*Keisuke Yoshida¹, Ryota Takagi¹, Naoki Uchida¹, Rina Ikeda¹ (1.Tohoku University)