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

Wed. May 28, 2025 10:45 AM - 12:15 PM 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:Takeshi Sagiya(Disaster Mitigation Research Center, Nagoya University), Ray Y Chuang(Department of Geography, National Taiwan University), Kuo-En Ching(National Cheng Kung 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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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)

11:00 AM - 11:15 AM

[SGD01-08] Complex Faulting in Eastern Taiwan: Insights from GNSS and InSAR observations during the 2024 Mw 7.4 Hualien Earthquake

*Daniele Cheloni¹, Nicola Angelo Famiglietti², Riccardo Caputo³, Cristiano Tolomei¹, Annamaria Vicari² (1.Istituto Nazionale di Geofisica e Vulcanologia, Via di Vigna Murata 605, 00143 Rome, Italy, 2.Istituto Nazionale di Geofisica e Vulcanologia, Sezione Irpinia, 83035 Grottaminarda, Italy, 3.Department of Physics and Earth Sciences, Ferrara University, 44122 Ferrara, Italy)

11:15 AM - 11:30 AM

[SGD01-09] Dynamic rupture process of active fault zones in eastern Taiwan with numerical simulation

*XiaoFei GUO^1,2, Yosuke Aoki², Jianghai Li¹ (1.School of Earth and Planetary Sciences, Peking University, 2.Earthquake Research Institute, The University of Tokyo)

11:30 AM - 11:45 AM

[SGD01-10] Analyzing Land Subsidence and Groundwater Depletion in Taiwan's Choushui River Alluvial Fan Using GNSS and Hydrogeological Techniques

*Wei-Chia Hung^1,2, Yi-An Chen¹, Shao-Hung Lin^1,3, Kuan-Chung Lin^1,2 (1.Green Environment Engineering Consultant Co. LTD, 2.National Yang Ming Chiao Tung University, 3.National Taiwan University)

11:45 AM - 12:00 PM

[SGD01-11] Coastal GNSS-IR Altimetry for Determination of Vertical and Depth Datums: A Case Study in Taiwan

*Chi-Ming Lee¹, Chung-Yen Kuo¹, Wen-Hau Lan², He-Chin Chen³, Ning-Kai Kang³, C.K. Shum⁴ (1.National Cheng Kung University, 2.National Kaohsiung University of Science and Technology, 3.National Land Surveying and Mapping Center, Ministry of the Interior, 4.The Ohio State University)

12:00 PM - 12:15 PM

[SGD01-12] Evaluation of Post-Processing GNSS Solutions for Depth Modernization

*I Yun Chou¹, Chung-Yen Kuo¹, Chi-Ming Lee¹, Jian-Sing Lyu², Yen-Ti Chen², Tzu-Pang Tseng¹ (1.Department of Geomatics, National Cheng Kung University, Taiwan, 2.Department of Land Administration, Ministry of the Interior, Taiwan)

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