The 2025 SSJ Fall Meeting
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Session Details

Room BRegular session : S09. Seismicity

[S09]Seismicity

Wed. Oct 22, 2025 9:00 AM - 10:30 AM JST
Wed. Oct 22, 2025 12:00 AM - 1:30 AM UTC
Room B(409+410)
chairperson:Ryo Osawa(Tohoku university), Kaito Shimomura(Tokyo University of Science)
9:00 AM - 9:15 AM JST(12:00 AM - 12:15 AM UTC)

[S09-07]Interplate and intraplate earthquake interactions in the downdip extension of the 2011 Tohoku-oki earthquake

*Ryo Osawa1, Ryota Hino1, Keisuke Yoshida1, Miku Ohtate1, Yusaku Ohta1 (1. Graduate School of Science, Tohoku University)
9:15 AM - 9:30 AM JST(12:15 AM - 12:30 AM UTC)

[S09-08]Seismicity Characteristics across Three Depth-Dependent Slip Regimes in the Japan Trench Subduction Zone

*Yuta Ito1, Tomoaki Nishikawa2, Yoshihiro Ito2, Shukei Ohyanagi1 (1. Graduate school of science, Kyoto University, 2. Disaster Prevention Research Institute Kyoto University, Kyoto University)
9:30 AM - 9:45 AM JST(12:30 AM - 12:45 AM UTC)

[S09-09]Spatiotemporal Characteristics of Fast and Slow earthquakes in the Hyuga-nada Region from OBS Observations

*ChingYu Hu1,2, Masanao Shinohara2, Yusuke Yamashita3, Takashi Tonegawa4, Tomoaki Yamada2, Takeshi Akuhara2, Kimihiro Mochizuki2 (1. Graduate School of Science, The University of Tokyo, 2. Earthquake Research Institute,The University of Tokyo, 3. Regional Cooperation and Disaster Mitigation Research Center, Faculty of Humanities, Miyazaki Municipal University, 4. Japan Agency for Marine-Earth Science and Technology)
9:45 AM - 10:00 AM JST(12:45 AM - 1:00 AM UTC)

[S09-10]Repeating Earthquake Detection Offshore El Salvador in the Middle America Subduction Zone: Implications for Plate Interface Slip Behavior

*Tomoaki NISHIKAWA1 (1. Disaster Prevention Research Institute, Kyoto University)
10:00 AM - 10:15 AM JST(1:00 AM - 1:15 AM UTC)

[S09-11]Slow Slip Event Detection and Associated Seismic Activation in the Hikurangi Subduction Zone, New Zealand

*Natsumi Takeda1, Tomoaki Nishikawa2 (1. Graduate School of Science, Kyoto University , 2. Disaster Prevention Research Institute, Kyoto University)
10:15 AM - 10:30 AM JST(1:15 AM - 1:30 AM UTC)

[S09-12]Depth-Dependent Swarm-like Behavior of Low-Frequency Earthquakes

*Kaito Shimomura1, Naofumi Aso1 (1. Tokyo University of Science)
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