The 2026 SSJ Fall Meeting
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Poster session (Onv. 4)Special session : S22. 80 Years after the 1946 Showa Nankai Earthquake: Achievements and Challenges in Nankai Trough Earthquake Research

[P22]80 Years after the 1946 Showa Nankai Earthquake: Achievements and Challenges in Nankai Trough Earthquake Research

Wed. Nov 4, 2026 5:30 PM - 7:00 PM JST
Wed. Nov 4, 2026 8:30 AM - 10:00 AM UTC
Room P22 (802ー805) (8F)

[P22-01]Efforts to train the younger generation in preparation
for the massive Nankai Trough earthquake

*Yoshiyuki KANEDA1, Kai Kondo1, Chikako Isouchi1 (1. IECMS Kagawa University)

[P22-02]Shallow tremor detection and energy rate estimation in Hyuga-nada using the N-net seafloor observation network

*Koji TAMARIBUCHI1, Naoki UCHIDA2 (1. Japan Meteorological Agency, 2. Earthquake Research Institute)

[P22-03]Hypocenter relocation using a 3D model around Nankai Trough (3): N-net inshore system introduction & catalog evaluation

*Katsuhiko SHIOMI1, Makoto MATSUBARA1, Ayako NAKANISHI2, Gou FUJIE2, Youichi ASANO1, Takayuki MIYOSHI1 (1. National Research Institute for Earth Science and Disaster Resilience, 2. Japan Agency for Marine-Earth Science and Technology)

[P22-04]Bayesian 3D travel-time tomography based on PINNs applied to marine active- and passive-source data off the Kii Peninsula

*Ryoichiro AGATA1, Kazuya Shiraishi1, Gou Fujie1, Dan Bassett2 (1. Japan Agency for Marine-Earth Science and Technology (JAMSTEC), 2. Earth Sciences New Zealand)

[P22-05]Age estimation of Nankai Trough seismo-turbidites, Offshore Cape Muroto using Paleomagnetic Secular Variation chronology

*Toshiya Kanamatsu1, Ken Ikehara2, Masao Iwai3 (1. Japan Agency for Marine-Earth Science and Technology, 2. National Institute of Advanced Industrial Science and Technology, 3. Kochi University)

[P22-06]Linking Modern and Historical Data with a Mechanical Model: Stress Accumulation and Release for the 1707 Hoei Event

*Tatsuhiko Saito1, Tatsuya Kubota1, Angela Meneses-Gutierrez1, Sachiko Tanaka1, Akemi Noda2, Kentaro Imai3 (1. NIED, 2. AIST, 3. JAMSTEC)

[P22-07]Preliminary Study on a Submarine Landslide Source for the 1605 Keicho Tsunami Based on Bay Resonance

*Kuya Masuda1, Tomoya Kurihara1, Kentaro Imai2, Yuichi Namegaya3, Kei Ioki3, Taro Arikawa4 (1. Japan Agency for Marine-Earth Science and Technology (JAMSTEC),Graduate School of Chuo University, 2. Japan Agency for Marine-Earth Science and Technology (JAMSTEC), 3. National Institute of Advanced Industrial Science and Technology (AIST), 4. Chuo University)

[P22-08]Spatiotemporal evolution of S-SSE in the Western Nankai trough deduced from strain, tilt, and GNSS data considering the plate geometry

*Sho Ishige1, Shin'ichi Miyazaki1, Suguru Yabe2, Tadafumi Ochi2, Norio Matsumoto2, Satoshi Itaba2, Yuichi Kiatagawa2, Kodai Sagae2, Takanori Matsuzawa3, Takuya Nishimura4, Masayuki Kano4 (1. Graduate School of Science, Kyoto University, 2. Geological Survey of Japan, AIST, 3. National Research Institute for Earth Science and Disaster Resilience, 4. Disaster Prevention Research Institute, Kyoto University)

[P22-09]Slow Slip Detection and Fault Slip Monitoring Utilizing Information Science

*Masayuki KANO1,2, Keisuke Yano3, Yusuke Tanaka4, Rikuto Fukushima5 (1. DPRI, Kyoto University, 2. Japan Agency for Marine-Earth Science and Technology, 3. The Institute of Statistical Mathematics, 4. Geospatial Information Authority of Japan, 5. Stanford University)

[P22-10]Subducting plate geometry model based on seismic observation and survey around Japan - Present & Future Plans

*Ayako NAKANISHI1, Gou Fujie1, Yasuyuki Nakamura1, Katsuhiko Shiomi2 (1. JAMSTEC, 2. NIED)

[P22-11]Numerical simulation of great earthquakes along the Nankai Trough focusing on shear stress change rate during the interseismic period

*Yuhi Ishino1, Makiko Ohtani1 (1. Graduate School, Kyoto University)

[P22-12]Advancement of Broadband Strong-Motion Simulation for Evaluating Diverse Source Scenarios of Nankai Trough Megathrust Earthquakes

*Takahiro MAEDA1, Ryuta IMAI1, Asako IWAKI1, Shin AOI1, Hiromitsu NAKAMURA1, Hiroyuki FUJIWARA1 (1. National Research Institute for Earth Science and Disaster Resilience)

[P22-13]Simultaneous Estimation of Coseismic Slip and Afterslip of the 2025 MJMA7.5 Off-Aomori Earthquake Using GNSS and Tsunami Source Data

*Naoki Aramoto1, Yusaku Ohta1, Tatsuya Kubota2, Hisahiko Kubo2, Wataru Suzuki2, Hiroaki Tsushima3, Miku Ohtate1, Takeshi Iinuma4, Ryota Hino1 (1. Graduate School of Science, Tohoku University, 2. National Research Institute for Earth Science and Disaster Resilience, 3. Meteorological Research Institute, 4. Japan Agency for Marine-Earth Science and Technology)

[P22-14]Tsunami Data Assimilation Using Time-Derivative Waveforms of Ocean Bottom Pressure: Application to the 2025 Off-Aomori Earthquake

*Yuichiro TANIOKA1, Yota Atobe2, Tatsuya Kubota3 (1. Center for Natural Hazard Research, Hokkaido University, 2. HokGraduate School of Science, Hokkaido University, 3. National Research Institute for Earth Science and Disaster Resilience)

[P22-15]The 2025-2026 off Sanriku-Aomori seismic-aseismic sequence, Japan

*Naoki UCHIDA1, Koji Tamaribuchi2, Keisuke Yoshida3, Yuji Itoh1, Sachiko Tanaka4, Hiroaki Tsushima5, Louise Maubant1, Xiaolong Zhang6,7, Shaoyang Li6, Emmanuel Caballero8, Taka'aki Taira9, Roland Bürgmann9 (1. The University of Tokyo, 2. Japan Meteorological Agency, 3. Tohoku University, 4. National Research Institute for Earth Science and Disaster Resilience, 5. Meteorological Research Institute, Japan Meteorological Agency, 6. Institute of Geology and Geophysics, Chinese Academy of Sciences, 7. College of Earth and Planetary Sciences, University of Chinese Academy of Sciences, 8. Earth Sciences New Zealand, 9. University of California, Berkeley)

[P22-16]Evolution of Coupled Seismic–Aseismic Slip During the 2025–2026 Aomori–Sanriku-Oki Megathrust Sequence, Japan

*Keisuke Yoshida YOSHIDA1 (1. Research Center for Prediction of Earthquakes and Volcanic Eruptions, Tohoku University)

[P22-17]Initial and Main Ruptures of the 1994 Sanriku-Haruka-Oki Earthquake from High-Degree-of-Freedom Source Analysis

*Yuuji YAGI1, Ryo Okuwaki1, Takane Hori2 (1. University of Tsukuba, 2. JAMSTEC)

[P22-18]Earthquake Sequence and Ongoing Aseismic Slip off Sanriku, Northeastern Japan, since Autumn 2025

*Hiroshi MUNEKANE1, Shinzaburo Ozawa1, Hiroshi Yarai1 (1. Geospatial Information Authority of Japan)

[P22-19]Slip Distribution of the 2026 Sanriku-oki Earthquake Sequence via 3D Heterogeneous Green's Functions and Sparse Priors

*Sota Murakami1, Takane Hori1, Takeshi Iinuma1 (1. Japan Agency for Marine-Earth Science and Technology)

[P22-20]Teleseismic Inversion of the 2011 Tohoku Earthquake Constrained by Static Slip Distribution Based on Tsunami and Geodetic Data

*Tatsuya Kubota1, Tatsuhiko Saito1 (1. National Research Institute for Earth Science and Disaster Resilience)
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