Thu. May 29, 2025 10:45 AM - 12:15 PM 201B (International Conference Hall, Makuhari Messe)

[J] Oral
| S (Solid Earth Sciences )
| S-CG Complex & General

[S-CG63] Reducing risks from earthquakes, tsunamis & volcanoes: new applications of realtime geophysical data

convener:Yuki Kodera(Meteorological Research Institute, Japan Meteorological Agency), Masumi Yamada(Disaster Prevention Research Institute, Kyoto University), Yusaku Ohta(Research Center for Prediction of Earthquakes and Volcanic Eruptions, Graduate School of Science, Tohoku University), Naotaka YAMAMOTO CHIKASADA(National Research Institute for Earth Science and Disaster Resilience), Chairperson:Yuki Kodera(Meteorological Research Institute, Japan Meteorological Agency), Naotaka YAMAMOTO CHIKASADA(National Research Institute for Earth Science and Disaster Resilience)

Thu. May 29, 2025 5:15 PM - 7:15 PM Poster Hall (Exhibition Hall 7&8, Makuhari Messe)

[J] Poster
| S (Solid Earth Sciences )
| S-CG Complex & General

[S-CG63] Reducing risks from earthquakes, tsunamis & volcanoes: new applications of realtime geophysical data

convener:Yuki Kodera(Meteorological Research Institute, Japan Meteorological Agency), Masumi Yamada(Disaster Prevention Research Institute, Kyoto University), Yusaku Ohta(Research Center for Prediction of Earthquakes and Volcanic Eruptions, Graduate School of Science, Tohoku University), Naotaka YAMAMOTO CHIKASADA(National Research Institute for Earth Science and Disaster Resilience)

Mon. May 26, 2025 1:45 PM - 3:15 PM 104 (International Conference Hall, Makuhari Messe)

[J] Oral
| M (Multidisciplinary and Interdisciplinary)
| M-TT Technology & Techniques

[M-TT37] New Developments in Earth Science Explored by Dense GNSS Observation Networks

convener:Yusaku Ohta(Research Center for Prediction of Earthquakes and Volcanic Eruptions, Graduate School of Science, Tohoku University), Mikiko Fujita(Japan Agency for Marine-Earth Science and Technology), Yuichi Otsuka(Institute for Space-Earth Environmental Research, Nagoya University), Takuya NISHIMURA(Disaster Prevention Research Institute, Kyoto University), Chairperson:Yusaku Ohta(Research Center for Prediction of Earthquakes and Volcanic Eruptions, Graduate School of Science, Tohoku University)

Mon. May 26, 2025 3:30 PM - 5:00 PM 104 (International Conference Hall, Makuhari Messe)

[J] Oral
| M (Multidisciplinary and Interdisciplinary)
| M-TT Technology & Techniques

[M-TT37] New Developments in Earth Science Explored by Dense GNSS Observation Networks

convener:Yusaku Ohta(Research Center for Prediction of Earthquakes and Volcanic Eruptions, Graduate School of Science, Tohoku University), Mikiko Fujita(Japan Agency for Marine-Earth Science and Technology), Yuichi Otsuka(Institute for Space-Earth Environmental Research, Nagoya University), Takuya NISHIMURA(Disaster Prevention Research Institute, Kyoto University), Chairperson:Mikiko Fujita(Japan Agency for Marine-Earth Science and Technology)

Mon. May 26, 2025 5:15 PM - 7:15 PM Poster Hall (Exhibition Hall 7&8, Makuhari Messe)

[J] Poster
| M (Multidisciplinary and Interdisciplinary)
| M-TT Technology & Techniques

[M-TT37] New Developments in Earth Science Explored by Dense GNSS Observation Networks

convener:Yusaku Ohta(Research Center for Prediction of Earthquakes and Volcanic Eruptions, Graduate School of Science, Tohoku University), Mikiko Fujita(Japan Agency for Marine-Earth Science and Technology), Yuichi Otsuka(Institute for Space-Earth Environmental Research, Nagoya University), Takuya NISHIMURA(Disaster Prevention Research Institute, Kyoto University)

Tue. May 27, 2025 5:15 PM - 7:15 PM Poster Hall (Exhibition Hall 7&8, Makuhari Messe)

[E] Poster
| A (Atmospheric and Hydrospheric Sciences )
| A-OS Ocean Sciences & Ocean Environment

[A-OS12] Ocean Science Revealed by Global Observation System

5:15 PM - 7:15 PM

[AOS12-P05] Observed abyssal temperature variability modulated by mesoscale eddies

*Shuya Wang¹, Yusaku Ohta^1,2, Motoyuki Kido³, Fumiaki Tomita^1,3, Ryota Hino² (1.Advanced Institute for Marine Ecosystem Change (WPI-AIMEC), Tohoku University, 2.Graduate School of Science, Tohoku University, 3.International Research Institute of Disaster Science (IRIDeS), Tohoku University)

Wed. May 28, 2025 10:45 AM - 12:15 PM 106 (International Conference Hall, Makuhari Messe)

[E] Oral
| S (Solid Earth Sciences )
| S-GD Geodesy

[S-GD01] Geodetic Advances in Crustal Dynamics and Environmental Change for Taiwan and Neighboring Regions

10:45 AM - 11:00 AM

[SGD01-07] A long-term slow slip event beneath the southern Ryukyu forearc revealed by 25 years of GNSS observations

★Invited Papers

*Chi-Hsien Tang^1,2, Ya-Ju Hsu², Yutaro Okada¹, Yusaku Ohta³, Takeshi Sagiya⁴, Pei-Ru Jian⁵, Yoshiaki Tamura⁶, Takaaki Jike⁶ (1.International Research Institute of Disaster Science, Tohoku University, 2.Institute of Earth Sciences, Academia Sinica, 3.Graduate School of Science, Tohoku University, 4.Disaster Mitigation Research Center, Nagoya University, 5.Department of Geosciences, National Taiwan University, 6.Mizusawa VLBI Observatory, National Astronomical Observatory of Japan)

Thu. May 29, 2025 9:00 AM - 10:30 AM Convention Hall (CH-B) (International Conference Hall, Makuhari Messe)

[J] Oral
| S (Solid Earth Sciences )
| S-SS Seismology

[S-SS12] Statistical seismology and underlying physical processes

10:00 AM - 10:15 AM

[SSS12-17] Spatio-temporal variation in seismic activity around the source areas of the 2021 and 2022 M7 intraslab earthquakes off Fukushima Prefecture

*Ryo Osawa¹, Ryota Hino¹, Keisuke Yoshida¹, Miku Ohtate¹, Yusaku Ohta¹ (1.Graduate School of Science, Tohoku University)

Mon. May 26, 2025 5:15 PM - 7:15 PM Poster Hall (Exhibition Hall 7&8, Makuhari Messe)

[J] Poster
| S (Solid Earth Sciences )
| S-VC Volcanology

[S-VC32] Active Volcanism

5:15 PM - 7:15 PM

[SVC32-P08] Source estimation of the 2024 Iwate Volcano unrest based on dense GNSS observation networks and strainmeter observations

*Yusaku Ohta¹, Miku Ohtate¹, Mare Yamamoto¹, Keitaro Ohno², Tomotsugu Demachi¹, Satoshi Miura¹ (1.Research Center for Prediction of Earthquakes and Volcanic Eruptions, Graduate School of Science, Tohoku University, 2.Geospatial Information Authority of Japan)

5:15 PM - 7:15 PM

[SVC32-P24] Estimation of crustal deformation of Miyakejima volcano and its pressure sources by using GNSS data

*Rin Matsubara¹, Takeshi Matsushima¹, Ayuka Joudoi¹, Atsushi Watanabe², Jun Oikawa², Yosuke Aoki², Yusaku Ohta³ (1.Kyushu University, 2.Tokyo University, 3.Tohoku University)

Tue. May 27, 2025 9:00 AM - 10:30 AM International Conference Room (IC) (International Conference Hall, Makuhari Messe)

[E] Oral
| S (Solid Earth Sciences )
| S-CG Complex & General

[S-CG45] Science of slow-to-fast earthquakes

9:15 AM - 9:30 AM

[SCG45-14] Spatiotemporal Evolution of Aseismic Slip Preceding the 2011 Tohoku-Oki Earthquake by Reprocessed OBPR Data

Hirata Kyosuke¹, *Ryota Hino¹, Taisuke Yamada¹, Kosuke Minamoto¹, Hideto Otsuka¹, Yusaku Ohta¹, Tatsuya Kubota² (1.Graduate School of Science, Tohoku University, 2.National Research Institute for Earth Science and Disaster Resilience)

Mon. May 26, 2025 10:45 AM - 12:15 PM 105 (International Conference Hall, Makuhari Messe)

[E] Oral
| S (Solid Earth Sciences )
| S-CG Complex & General

[S-CG46] Uncovering stress accumulation and fault strengthening of megathrust earthquakes

11:15 AM - 11:30 AM

[SCG46-09] Postseismic deformation of the 2011 Tohoku earthquake: Insights from GNSS, GNSS-A, and repeating earthquake observations

★Invited Papers

*Fumiaki Tomita¹, Tianhaozhe Sun^2,3, Takeshi Iinuma⁴, Motoyuki Kido¹, Yusaku Ohta⁵, Naoki Uchida^5,6, Kelin Wang^2,3 (1.International Research Institute of Disaster Science, Tohoku University, 2.Pacific Geoscience Centre, Geological Survey of Canada, 3.School of Earth and Ocean Sciences, University of Victoria, 4.Japan Agency for Marine-Earth Science and Technology, 5.Graduate School of Science, Tohoku University, 6.Earthquake Research Institute, University of Tokyo)

Wed. May 28, 2025 1:45 PM - 3:15 PM Convention Hall (CH-A) (International Conference Hall, Makuhari Messe)

[J] Oral
| S (Solid Earth Sciences )
| S-CG Complex & General

[S-CG55] Ocean Floor Geoscience

2:45 PM - 3:00 PM

[SCG55-28] Seafloor Crustal Deformation Observations Utilizing Unmanned Surface Vehicles at Plate Subduction zones around the Japanese Islands

*Takeshi Iinuma¹, Motoyuki Kido², Yusaku Ohta³, Tatsuya Fukuda¹, Fumiaki Tomita², Yusuke Yokota⁴, Ryota Hino³, Mikiko Fujita¹, Takane Hori¹ (1.Japan Agency for Marine-Earth Science and Technology (JAMSTEC), 2.International Research Institute of Disaster Science, Tohoku University, 3.Graduate School of Science, Tohoku University, 4.Institute of Industrial Science, University of Tokyo)

Wed. May 28, 2025 3:30 PM - 5:00 PM Convention Hall (CH-A) (International Conference Hall, Makuhari Messe)

[J] Oral
| S (Solid Earth Sciences )
| S-CG Complex & General

[S-CG55] Ocean Floor Geoscience

3:30 PM - 3:45 PM

[SCG55-30] Initiation of GNSS-Acoustic seafloor geodetic observation along the Japan trench off Boso

*Fumiaki Tomita^1,2,3, Motoyuki Kido^1,3, Kazuo Nakahigashi⁴, Yusaku Ohta^2,3, Kanata Endo⁴, Chi-Hsien Tang¹, Ryota Hino³ (1.International Research Institute of Disaster Science, Tohoku University, 2.WPI-AIMEC, Tohoku University, 3.Graduate School of Science, Tohoku University, 4.Department of Marine Resources and Energy, Tokyo University of Marine Science and Technology)

4:30 PM - 4:45 PM

[SCG55-34] Is the small shortening of the baseline length detected by Acoustic Distance Meter significant?

*Shoutarou Matsumoto¹, Motoyuki Kido², Ryota Hino¹, Yusaku Ohta³ (1.Graduate School of Science, Tohoku University, 2.International Research Institute for Disaster Science, Tohoku University, 3.Research Center for Prediction of Earthquakes and Volcanic Eruptions, Graduate School of Science, Tohoku University)

4:45 PM - 5:00 PM

[SCG55-35] Evaluation of vertical oceanic processes affecting seafloor pressure using MRI.COM and DONET observations

*Hideto Otsuka^1,2, Yusaku Ohta^2,3, Shuya Wang³, Norihisa Usui⁴, Ryota Hino² (1.Seiko Gakuin High School, 2.Graduate School of Science, Tohoku University, 3.Advanced Institute for Marine Ecosystem Change, Tohoku University, 4.Meteorological Research Institute, Japan Meteorological Agency)

Wed. May 28, 2025 5:15 PM - 7:15 PM Poster Hall (Exhibition Hall 7&8, Makuhari Messe)

[J] Poster
| S (Solid Earth Sciences )
| S-CG Complex & General

[S-CG55] Ocean Floor Geoscience

5:15 PM - 7:15 PM

[SCG55-P32] Quantitative evaluation of accuracy and precision for the RBR pressure sensor based on the laboratory experiment

*Shuichi Suzuki¹, Makiko Satp¹, Yusaku Ohta¹, Hiroaki Kajikawa², Tomomi Onodera¹, Takayuki Abe¹, Kazuma Saito¹, Noboru Fujii¹, Naoki Takahashi¹, Ryota Hino¹ (1.Graduate school of science, Tohoku University, 2.National Metrology Institute of Japan)

5:15 PM - 7:15 PM

[SCG55-P33] Assessment of long-term drift removal performance using the A-0-A approach based on the laboratory experiment

*Takumi Hagihara¹, Yusaku Ohta¹, Ryota Hino¹, Makiko Sato¹, Syuichi Suzuki¹, Hiroaki Kajikawa² (1.Tohoku University, 2.National Institute of Advanced Industrial Science and Technology)

Thu. May 29, 2025 9:00 AM - 10:30 AM 103 (International Conference Hall, Makuhari Messe)

[J] Oral
| S (Solid Earth Sciences )
| S-CG Complex & General

[S-CG61] Dynamics in mobile belts

9:30 AM - 9:45 AM

[SCG61-15] Crustal Strain Rate Distribution Derived from an Ultra-Dense GNSS Observation Network in Japan

*Miku Ohtate¹, Yusaku Ohta¹, Mako Ohzono², Hiroaki Takahashi² (1.Graduate School of Science, Tohoku University, 2.Faculty of Science, Hokkaido University)

Mon. May 26, 2025 1:45 PM - 3:15 PM 104 (International Conference Hall, Makuhari Messe)

[J] Oral
| M (Multidisciplinary and Interdisciplinary)
| M-TT Technology & Techniques

[M-TT37] New Developments in Earth Science Explored by Dense GNSS Observation Networks

1:45 PM - 2:00 PM

[MTT37-01] Operation and current achievement of a “Consortium to utilize the SoftBank original reference sites for Earth and Space Science”

*Yusaku Ohta¹ (1.Research Center for Prediction of Earthquakes and Volcanic Eruptions, Graduate School of Science, Tohoku University)

2:30 PM - 2:45 PM

[MTT37-04] Estimation of a coseismic slip distribution model considering self-similarity of the 2024 Noto Peninsula earthquake using very dense geodetic observation

*Taisuke Yamada¹, Yusaku Ohta¹, Takuya NISHIMURA², Yoshihiro Hiramatsu³, Yohei Kinoshita⁴, Keisuke Yoshida¹, Yoshiaki Ito¹, Miku Ohtate¹ (1.Graduate School of Science, Tohoku University, 2.Disaster Prevention Research Institute, Kyoto University, 3.Kanazawa University, 4.University of Tsukuba)

3:00 PM - 3:15 PM

[MTT37-06] Utilizing Dense Tropospheric Delay Products from GNSS in InSAR Noise Correction

Sardila Nurulhikmah Sailellah¹, *Yo Fukushima^1,2, Yusaku Ohta¹ (1.Graduate School of Science, Tohoku University, 2.International Research Institute of Disaster Science, Tohoku University)

Mon. May 26, 2025 3:30 PM - 5:00 PM 104 (International Conference Hall, Makuhari Messe)

[J] Oral
| M (Multidisciplinary and Interdisciplinary)
| M-TT Technology & Techniques

[M-TT37] New Developments in Earth Science Explored by Dense GNSS Observation Networks

4:30 PM - 4:45 PM

[MTT37-11] Optimization of a GNSS multipath noise reduction method based on MHM methods

*Yoshiaki Ito¹, Yusaku Ohta¹ (1.Graduate School of Science, Tohoku University)

Mon. May 26, 2025 5:15 PM - 7:15 PM Poster Hall (Exhibition Hall 7&8, Makuhari Messe)

[J] Poster
| M (Multidisciplinary and Interdisciplinary)
| M-TT Technology & Techniques

[M-TT37] New Developments in Earth Science Explored by Dense GNSS Observation Networks

5:15 PM - 7:15 PM

[MTT37-P01] Proposal for a Correction Method for Displacement Steps Caused by Maintenance in SoftBank Original reference Sites Time Series

*Miku Ohtate¹, Yusaku Ohta¹ (1.Graduate School of Science, Tohoku University)

5:15 PM - 7:15 PM

[MTT37-P02] Preliminary analysis of common-mode errors at GNSS stations operated by SoftBank

*Yutaro Okada¹, Yusaku Ohta², Miku Ohtate², Yo Fukushima¹ (1.International Research Institute of Disaster Science, 2.Graduate School of Science, Tohoku University)

5:15 PM - 7:15 PM

[MTT37-P03] Postseismic deformation of the 2024 M7.6 Noto Peninsula earthquake observed by dense GNSS networks

*Takuya NISHIMURA¹, Yoshihiro Hiramatsu², Yusaku Ohta³ (1.Disaster Prevention Research Institute, Kyoto University, 2.Faculty of Geosciences and Civil Engineering, Institute of Geosciences and Engineering, Kanazawa University, 3.Graduate School of Science, Tohoku University)

Yusaku Ohta

Convener, Chairperson

Speaker, Author, Co-Author

★Invited Papers

★Invited Papers