*Sachiko Tanaka¹, Tatsuhiko Saito¹, Akemi Noda¹ (1.National Research Institute for Earth Science and Disaster Resilience)

*Mitsutaka Oshima¹ (1.Shimizu corporation)

*Mitsutaka Oshima¹ (1.Shimizu corporation)

*Tomotake Ueno¹, Tatsuhiko Saito¹ (1.National Research Institute for Earth Science and Disaster Prevention)

*Tomotake Ueno¹, Tatsuhiko Saito¹ (1.National Research Institute for Earth Science and Disaster Prevention)

*Ping en Li¹ (1.Institute of Geophysics, China Earthquake Administration)

*Ping en Li¹ (1.Institute of Geophysics, China Earthquake Administration)

*Manami Suzuki ¹, Akiko Hasemi², Tomomi Okada¹, Toru Matsuzawa¹, Norihito Umino¹, Noriko Tsumura³, Tadashi Yamashina⁴, Group for the aftershock observations of the 2011 off the Pacific of Tohoku Earthquake (1.Research Center for Prediction of Earthquakes and Volcanic Eruptions, Graduate School of Science, Tohoku University, 2.Yamagata University, 3.Chiba University, 4.Kochi University)

*Manami Suzuki ¹, Akiko Hasemi², Tomomi Okada¹, Toru Matsuzawa¹, Norihito Umino¹, Noriko Tsumura³, Tadashi Yamashina⁴, Group for the aftershock observations of the 2011 off the Pacific of Tohoku Earthquake (1.Research Center for Prediction of Earthquakes and Volcanic Eruptions, Graduate School of Science, Tohoku University, 2.Yamagata University, 3.Chiba University, 4.Kochi University)

*Imamura Katsuki¹, Hisatoshi Baba¹, Kayoko Tsuruga³, Nagisa Nakao², Kenji Nakata⁴, Takahito Nishimiya⁴ (1.Department of Marine and Earth Science, Tokai University, 2.Graduate School of Oceanography, Tokai University, 3.Tokyo University of Marine Science and Technology, 4.Meteorological Research Institute, Japan Meteorological Agency)