*Hiroto Yamaguchi¹, Shuichi Kodaira², Gou Fujie², Tetsuo No², Yasuyuki Nakamura², Kazuya Shiraishi², Nobukazu Seama¹ (1. Kobe University, 2. Japan Agency for Marine-Earth Science and Technology)

11:15 AM - 11:30 AM

[S22-06] Re-evaluation of normal fault distribution in the outer slope of the western Kuril Trench, off the southeastern coast of Hokkaido, based on recent acquired seismic reflection data and bathymetry data

*Tetsuo NO¹, Shuichi Kodaira¹, Kentaro Imai¹, Koichiro Obana¹, Gou Fujie¹, Yasuyuki Nakamura¹, Kazuya Shiraishi¹, Ryo Miura¹, Masao Nakanishi² (1. JAMSTEC, 2. Graduate School of Science, Chiba Univ.)

11:30 AM - 11:45 AM

[S22-07] Development of Real Time Tsunami Forecast Method for Outer-Rise Earthquakes occurred along the Kurile Trench

*Miu Matano¹, Yuichiro Tanioka¹, Tatsuya Nakagaki¹, Masato Kamiya², Toshitaka Baba², Tetsuo No³, Kentarou Imai³, Yusuke Yamanaka¹, Shuichi Kodaira³ (1. Hokkaido University, 2. Tokushima University, 3. JAMSTEC)

11:45 AM - 12:00 PM

[S22-08] Numerical investigation of tsunami in tsunami earthquakes for developing a real time tsunami forecasting method using S-net data

Tatsuto Oishi¹, *Yuichiro Tanioka¹, Yusuke Yamanaka¹ (1. Hokkaido University)

Room A

[S22] PM-2

Mon. Oct 24, 2022 3:45 PM - 4:45 PM ROOM A (1st floor (Kaderu Hall))

chairperson:Mako Ohzono(Faculty of Science, Hokkaido University)

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3:45 PM - 4:00 PM

[S22-09] Seafloor Geodetic Observations along the Kuril Trench off Nemuro

*Fumiaki TOMITA¹, Motoyuki Kido¹, Yusaku Ohta², Ryota Hino², Takeshi Iinuma³, Chie Honsho², Mako Ohzono⁴, Hiroaki Takahashi⁴ (1. IRIDeS, Tohoku University, 2. Graduate School of Science, Tohoku University, 3. Japan Agency for Marine-Earth Science and Technology, 4. Graduate School of Science, Hokkaido University)

4:00 PM - 4:15 PM

[S22-10] Crustal deformation characteristics in and around Hokkaido and Tohoku region as seen from ITRF14 reference frame

*Yuka Ishida¹, Hiroaki Takahashi², Mako Ohzono², Weiwei Wu³, Guojie Meng³ (1. The Department of Natural History Sciences, Graduate School of Science, Hokkaido University, 2. Faculty of Science, Hokkaido University, 3. Institute for Earthquake Forecasting, China Earthquake Administration)

4:15 PM - 4:30 PM

[S22-11] Estimate an interplate coupling in the southern Kuril trench with a stress-constrained inversion method

*Shunsuke Imai¹, Hiroaki Takahashi² (1. Graduate School of Science, Hokkaido University, 2. Institute of Seismology and Volcanology, Faculty of Science, Hokkaido University, Sapporo, Japan)

4:30 PM - 4:45 PM

[S22-12] Strain concentration around the volcanic front in eastern Hokkaido caused by southern Kuril subduction

*Mako OHZONO¹, Hiroaki TAKAHASHI¹ (1. ISV, Faculty of Science, Hokkaido University)

Room A

[S22] PM-3

Mon. Oct 24, 2022 5:00 PM - 6:00 PM ROOM A (1st floor (Kaderu Hall))

chairperson:Takahiro Shiina(Geological Survey of Japan, National Institute of Advanced Industrial Science and Technology)

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5:00 PM - 5:15 PM

[S22-13] Current state of seismic activity off Tokachi and Nemuro

*Hiroaki TAKAHASHI¹, Masayoshi Ichiyanagi¹, Ryosuke Azuma² (1. Hokkaido University, 2. Tohoku University)

5:15 PM - 5:30 PM

[S22-14] Recent seismic activity in and around Hokkaido, Japan (2018-2021)

*Tetsuo TAKANAMI¹ (1. Hokkaido Research Center of Geology)

5:30 PM - 5:45 PM

[S22-15] Spatio-temporal seismic velocity variation near the Japan-Kuril trenches junction revealed from long-term dense-OBS network observation

*Takehiro Sato¹, Ryosuke Azuma¹, Ryota Takagi¹, Ryota Hino¹, Masanao Shinohara² (1. Tohoku University, 2. Earthquake Research Institute, The University of Tokyo )

5:45 PM - 6:00 PM

[S22-16] Shallow VLFE observation at the Erimo-oki, southern off Hokkaido, using a broadband OBS array and F-net

*Ryosuke AZUMA¹, Ryota Takagi¹, Satoru Baba², Ryota Hino¹, Masanao Shinohara³ (1. RCPEVE, Graduate School of Science, Tohoku Univ., 2. JAMSTEC, 3. ERI, Univ. Tokyo)

Poster session (3rd Day)

[S22P] PM-P

Wed. Oct 26, 2022 1:30 PM - 4:00 PM ROOM P-2 (10th floor (Conference Room 1010-1070))

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1:30 PM - 4:00 PM

[S22P-01] Estimation of early postseismic slip following the 2003 Tokachi-oki earthquake by assimilating high-rate GNSS data

*Masayuki KANO¹, Yuji Itoh^2,3 (1. Tohoku University, 2. ISTerre, Université Grenoble Alpes, 3. Earthquake Research Institute, the University of Tokyo)

1:30 PM - 4:00 PM

[S22P-02] Evaluation for hypocenter estimation error in the Kuril trench using seismic data

*Masayoshi ICHIYANAGI¹, Hiroaki Takahashi¹, Ryosuke Azuma² (1. ISV, Hokkaido University, 2. AOB, Tohoku University)

1:30 PM - 4:00 PM

[S22P-03] Three-dimensional Vs structure in the offshore forearc region along the Japan and Kuril trenches estimated by ambient noise tomography

*Ryota Takagi¹, Kiwamu Nishida² (1. Graduate School of Science, Tohoku University, 2. Earthquake Research Institute, The University of Tokyo)

1:30 PM - 4:00 PM

[S22P-04] Difference of tsunami sources by great earthquakes that occurred in the southern Kuril trench around the 17th and 13th centuries

*Kei IOKI¹, Yuki SAWAI¹, Yuichi NAMEGAYA¹ (1. Geological Survey of Japan, AIST)

1:30 PM - 4:00 PM

[S22P-05] A preliminary study on the western source area of the tsunami that struck the Pacific coast of Hokkaido, Japan, on April 25th, 1843

*Yuichi NAMEGAYA¹ (1. Research Institute of Earthquake and Volcano Geology (IEVG), National Institute of Advanced Industrial Science and Technology (AIST) )

1:30 PM - 4:00 PM

[S22P-06] Nonlinear and linearized propagation characteristics of the 2003 Tokachi-Oki tsunami

*Yusuke YAMANAKA¹, Yuichiro TANIOKA¹ (1. Institute of Seismology and Volcanology, Hokkaido University)

Sessions

Special session » S22. Earthquakes, tsunamis, and related phenomena around Hokkaido subduction zone

[S22] AM-1

[S22-01] [Invited]Recurrence and forecast of great earthquakes along Kuril Trench

[S22-02] Identifying the sources of the 1611 Keicho tsunami

[S22-03] Geological evidence of coastal erosion generated with 17th-century tsunami in a beach ridge plain, eastern Hokkaido

[S22-04] Liquefaction history of the ground in the area around the Kuril Islands Trench, Hokkaido, Japan, based on archaeological data

[S22] AM-2

[S22-05] Structure difference across the submarine canyon in the Kuril subduction zone off Hokkaido and its relation with interplate slip behaviors

[S22-06] Re-evaluation of normal fault distribution in the outer slope of the western Kuril Trench, off the southeastern coast of Hokkaido, based on recent acquired seismic reflection data and bathymetry data

[S22-07] Development of Real Time Tsunami Forecast Method for Outer-Rise Earthquakes occurred along the Kurile Trench

[S22-08] Numerical investigation of tsunami in tsunami earthquakes for developing a real time tsunami forecasting method using S-net data

[S22] PM-2

[S22-09] Seafloor Geodetic Observations along the Kuril Trench off Nemuro

[S22-10] Crustal deformation characteristics in and around Hokkaido and Tohoku region as seen from ITRF14 reference frame

[S22-11] Estimate an interplate coupling in the southern Kuril trench with a stress-constrained inversion method

[S22-12] Strain concentration around the volcanic front in eastern Hokkaido caused by southern Kuril subduction

[S22] PM-3

[S22-13] Current state of seismic activity off Tokachi and Nemuro

[S22-14] Recent seismic activity in and around Hokkaido, Japan (2018-2021)

[S22-15] Spatio-temporal seismic velocity variation near the Japan-Kuril trenches junction revealed from long-term dense-OBS network observation

[S22-16] Shallow VLFE observation at the Erimo-oki, southern off Hokkaido, using a broadband OBS array and F-net

[S22P] PM-P

[S22P-01] Estimation of early postseismic slip following the 2003 Tokachi-oki earthquake by assimilating high-rate GNSS data

[S22P-02] Evaluation for hypocenter estimation error in the Kuril trench using seismic data

[S22P-03] Three-dimensional Vs structure in the offshore forearc region along the Japan and Kuril trenches estimated by ambient noise tomography

[S22P-04] Difference of tsunami sources by great earthquakes that occurred in the southern Kuril trench around the 17th and 13th centuries

[S22P-05] A preliminary study on the western source area of the tsunami that struck the Pacific coast of Hokkaido, Japan, on April 25th, 1843

[S22P-06] Nonlinear and linearized propagation characteristics of the 2003 Tokachi-Oki tsunami

Authentication