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

Wed. May 28, 2025 9:00 AM - 10:30 AM 106 (International Conference Hall, Makuhari Messe)

convener:Kuo-En Ching(National Cheng Kung University), Takeshi Sagiya(Disaster Mitigation Research Center, Nagoya University), Ray Y Chuang(Department of Geography, National Taiwan University), Chairperson:Kuo-En Ching(National Cheng Kung University), Takeshi Sagiya(Disaster Mitigation Research Center, Nagoya University), Ray Y Chuang(Department of Geography, National Taiwan University)

This session aims to highlight advancements in geodetic and remote sensing technologies for observing and analyzing crustal dynamics, natural hazards, and environmental changes in Taiwan and surrounding regions. Located at the convergence of the Philippine Sea and Eurasian plates, this region faces high seismicity, frequent land subsidence, and significant coastal variations, providing a unique field for geoscientific research.

This session will address geodetic observations of solid Earth processes, focusing on issues related to natural hazards, such as land subsidence and earthquakes, and environmental changes, including coastline monitoring and the establishment of time-dependent datums/reference frames. Studies utilizing geodetic methods such as GNSS, InSAR, and gravimetry are encouraged, with specific applications for land subsidence monitoring, earthquake activity analysis, and coastline change tracking. With recent advancements in multi-scale InSAR, high-frequency GNSS data, and dynamic reference frameworks, the accuracy and temporal resolution of observations in tectonic and environmental monitoring have significantly improved.

The outcomes from this session are expected to contribute to governmental disaster management strategies, protection of infrastructure, and environmental conservation efforts, underscoring the practical importance of geodetic research in risk mitigation. This session is intended as a platform for researchers to share insights into the applications, theories, and techniques of geodesy, emphasizing innovations that advance hazard assessment and environmental monitoring capabilities.

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9:00 AM - 9:15 AM

[SGD01-01] Strain Localization, Inelastic Deformation, and Long-term Strain Rate in Inland Japan and Their Implications for Seismic Hazard

*Takeshi Sagiya¹, Tamaoki Ai², Angela Meneses-Gutierrez³ (1.Disaster Mitigation Research Center, Nagoya University, 2.Graduate School of Environmental Studies, Nagoya University, 3.National Research Institute for Earth Science and Disaster Resilience)

9:15 AM - 9:30 AM

[SGD01-02] Directional Resonance Variations Across the Highly Deformed Fault-bounded Mudstone Area in Southwestern Taiwan

*Ruey-Juin Rau¹, Cheng-Feng Wu¹, Ting-Yu Lin¹ (1.National Cheng Kung University)

9:30 AM - 9:45 AM

[SGD01-03] Creep Rate Changes of Shallow Active Faults in Southwestern Taiwan Based on InSAR and GNSS analysis

*Lishiue Chen¹, Ray Y Chuang², Takeshi Sagiya^3,1 (1.Graduate School of Environmental Studies, Nagoya University, 2.Department of Geography, National Taiwan University, 3.Disaster Mitigation Research Center, Nagoya University)

9:45 AM - 10:00 AM

[SGD01-04] Inferring rheology of mud diapirs in SW Taiwan from postseismic deformation of the 2016 Mw 6.4 Meinong earthquake

*Sambuddha Dhar¹, Jun Muto¹, Kuo-En Ching², Youichiro Takada³, Ruey-Juin Rau⁴, Yuri Ishimaru³, Pei-Ching Tsai² (1.Department of Earth Science, Tohoku University, Sendai, Japan, 2.Department of Geomatics, National Cheng Kung University, Tainan, Taiwan, 3.Department of Earth and Planetary Sciences, Hokkaido University, Sapporo, Japan, 4.Department of Earth Sciences, National Cheng Kung University, Tainan, Taiwan)

10:00 AM - 10:15 AM

[SGD01-05] Integration of seismo-geodetic moment rates for earthquake forecasting with an emphasis on strain rate analysis in southwestern Taiwan

*Neha Neha¹, Ray Y. Chuang¹, Takuya Nishimura², Zixin Lee¹, A. John Haines³ (1.Department of Geography, National Taiwan University, Taiwan, 2.Disaster Prevention Research Institute, Kyoto University, Gokasho, Uji, Japan, 3.GNS Science, Lower Hutt, New Zealand)

10:15 AM - 10:30 AM

[SGD01-06] Analysis of Long-Term Slip Rates of Active Faults and Regional Surface Deformation Rates Using a Finite Element Kinematic Model: Application to the Taiwan Orogenic Belt

*Yi Jui Lee¹, Jyr-Ching Hu² (1.SINOTECH engineering consultants, INC., 2.Department of Geosciences, National Taiwan University)

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