*Yukihiro Nakatani¹, Hiroshi Yakiwara¹, Shuichiro Hirano¹, Reiji Kobayashi², Hiroki Miyamachi², Shigeru Nakao², Kazunari Uchida³, Takeshi Matsushima³, Hiroshi Shimizu³, Kazuo Nakahigashi⁴, Yusuke Yamashita⁵, Hideji Abe⁶, Tomoaki Yamada⁶, Masanao Shinohara⁶ (1.Nansei-Toko Observatory for Earthquakes and Volcanoes, Kagoshima University, 2.Graduate School of Science and Engineering, Kagoshima University, 3.Institute of Seismology and Volcanology, Faculty of Science, Kyushu University, 4.Tokyo University of Marine Science and Technology, 5.Disaster Prevention Research Institute, Kyoto University, 6.Earthquake Research Institute, the University of Tokyo)

*Yukihiro Nakatani¹, Hiroshi Yakiwara¹, Shuichiro Hirano¹, Reiji Kobayashi², Hiroki Miyamachi², Shigeru Nakao², Kazunari Uchida³, Takeshi Matsushima³, Hiroshi Shimizu³, Kazuo Nakahigashi⁴, Yusuke Yamashita⁵, Hideji Abe⁶, Tomoaki Yamada⁶, Masanao Shinohara⁶ (1.Nansei-Toko Observatory for Earthquakes and Volcanoes, Kagoshima University, 2.Graduate School of Science and Engineering, Kagoshima University, 3.Institute of Seismology and Volcanology, Faculty of Science, Kyushu University, 4.Tokyo University of Marine Science and Technology, 5.Disaster Prevention Research Institute, Kyoto University, 6.Earthquake Research Institute, the University of Tokyo)

*Kei Katsumata¹, Mako Ohzono¹, Hiroshi Aoyama¹, Ryo Tanaka¹, Masamitsu Takada¹, Masayoshi Ichiyanagi¹, Teruhiro Yamaguchi¹, Kazumi Okada¹, Hiroaki Takahashi¹, Shin'ichi Sakai², Satoshi Matsumoto³, Tomomi Okada⁴, Toru Matsuzawa⁴, Shuichiro Hirano⁵, Toshiko Terakawa⁶, Shinichiro Horikawa⁶, Masahiro Kosuga⁷, Hiroshi Katao⁸, Yoshihisa Iio⁸, Airi Nagaoka⁸, Noriko Tsumura⁹, Tomotake Ueno¹⁰, the Group for the Aftershock Observations of the 2018 Hokkaido Eastern Iburi Earthquake (1.Institute of Seismology and Volcanology, Faculty of Science, Hokkaido University, 2.Earthquake Research Institute, University of Tokyo, 3.Institute of Seismology and Volcanology, Faculty of Science, Kyushu University, 4.Research Center for Prediction of Earthquakes and Volcanic Eruptions, Graduate School of Science, Tohoku University, 5.Nansei-Toko Observatory for Earthquakes and Volcanoes, Graduate School of Science and Engineering, Kagoshima University, 6.Earthquake and Volcano Research Center, Graduate School of Environmental Studies, Nagoya University, 7.Graduate School of Science and Technology, Hirosaki University, 8.Research Center for Earthquake Prediction, Disaster Prevention Research Institute, Kyoto University, 9.Graduate School of Science, Chiba University, 10.National Research Institute for Earth Science and Disaster Prevention)

*Hiroki Miyamachi¹, Hiroaki Takahashi², Hiroshi Aoyama², Mako Ohzono², Takahiro Shiina⁶, Masamitsu Takada², Masayoshi Ichiyanagi², Teruhiro Yamaguchi², Yuki Susukida², Saito Kazuma², Chihiro Ito², Yoshio Murai², Tatsuya Nakagaki², Tomoki Tsutsui³, Ryuichi Takei³, Yuuya Tada³, Mare Yamamoto⁴, Satoshi Hirahara⁴, Takashi NAKAYAMA⁴, Ryosuke Azuma⁴, Syuichi Suzuki⁴, Toshinori Sato⁵, Eiji Kurashimo⁶, Miwako Ando⁶, Shinichi Tanaka⁶, Satoshi Ikezawa⁶, Tomoaki Yamada⁶, Kazuo Nakahigashi⁷, Yuta Maeda⁸, Shinichiro Horikawa⁸, Kenjirou Matsuhiro⁸, Takashi OKUDA⁸, Shuhei Tsuji⁸, Naoki Sogawa⁸, Hiroshi Katao⁹, Takuo Shibutani⁹, Tsutomu Miura⁹, Nakagawa Jun⁹, Itaru Yoneda⁹, Takeshi Tameguri⁹, Kosei Takishita⁹, Kazuho Nakai⁹, Yusuke Yamashita⁹, Takeshi Matsushima¹⁰, Kazunari Uchida¹⁰, Rintaro Miyamachi¹⁰, Hiroshi Yakiwara¹, Shuichiro Hirano¹, Takeshi Kubo¹, Kenyu Sakao¹ (1.Kagoshima University, 2.Hokkaido University, 3.Akita University, 4.Tohoku University, 5.Chiba University, 6.University of Tokyo, 7.Tokyo University of Marine Science and Technology, 8.Nagoya University, 9.Kyoto University, 10.Kyushu University)

*Hiroki Miyamachi¹, Hiroaki Takahashi², Hiroshi Aoyama², Mako Ohzono², Takahiro Shiina⁶, Masamitsu Takada², Masayoshi Ichiyanagi², Teruhiro Yamaguchi², Yuki Susukida², Saito Kazuma², Chihiro Ito², Yoshio Murai², Tatsuya Nakagaki², Tomoki Tsutsui³, Ryuichi Takei³, Yuuya Tada³, Mare Yamamoto⁴, Satoshi Hirahara⁴, Takashi NAKAYAMA⁴, Ryosuke Azuma⁴, Syuichi Suzuki⁴, Toshinori Sato⁵, Eiji Kurashimo⁶, Miwako Ando⁶, Shinichi Tanaka⁶, Satoshi Ikezawa⁶, Tomoaki Yamada⁶, Kazuo Nakahigashi⁷, Yuta Maeda⁸, Shinichiro Horikawa⁸, Kenjirou Matsuhiro⁸, Takashi OKUDA⁸, Shuhei Tsuji⁸, Naoki Sogawa⁸, Hiroshi Katao⁹, Takuo Shibutani⁹, Tsutomu Miura⁹, Nakagawa Jun⁹, Itaru Yoneda⁹, Takeshi Tameguri⁹, Kosei Takishita⁹, Kazuho Nakai⁹, Yusuke Yamashita⁹, Takeshi Matsushima¹⁰, Kazunari Uchida¹⁰, Rintaro Miyamachi¹⁰, Hiroshi Yakiwara¹, Shuichiro Hirano¹, Takeshi Kubo¹, Kenyu Sakao¹ (1.Kagoshima University, 2.Hokkaido University, 3.Akita University, 4.Tohoku University, 5.Chiba University, 6.University of Tokyo, 7.Tokyo University of Marine Science and Technology, 8.Nagoya University, 9.Kyoto University, 10.Kyushu University)

*Youichi Asano¹, Kazuhiko Goto², Hiroshi Yakiwara³, Shuichiro Hirano³ (1.National Research Institute for Earth Science and Disaster Resilience, 2.Association for the development of earthquake prediction, 3.Nansei-toko Observatory for Earthquakes and Volcanoes, Kagoshima University)

*Youichi Asano¹, Kazuhiko Goto², Hiroshi Yakiwara³, Shuichiro Hirano³ (1.National Research Institute for Earth Science and Disaster Resilience, 2.Association for the development of earthquake prediction, 3.Nansei-toko Observatory for Earthquakes and Volcanoes, Kagoshima University)