Revealing Crustal Deformation and Strain Rate in Taiwan Using InSAR and GNSS
Revealing Crustal Deformation and Strain Rate in Taiwan Using InSAR and GNSS
复制标题
利用合成孔径雷达干涉测量（InSAR）与全球导航卫星系统（GNSS）揭示台湾地区的地壳形变及应变率
DOI：
10.1029/2022gl101306
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发表时间：
2022-10
影响因子：
5.2
通讯作者：
Kathryn Franklin;Mong‐Han Huang
中科院分区：
文献类型：
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作者：
Kathryn Franklin;Mong‐Han Huang
震间形变描述了地壳应变在构造板块内和沿着板块边界的逐渐积累，然后突然释放为地震。在本研究中，我们使用5年的高时空大地测量，包括全球导航卫星系统和干涉合成孔径雷达监测三维地震间地壳形变和水平应变率在台湾。我们发现，在台湾东部的菲律宾海和欧亚板块之间的板块边界沿着有显著的变形（应变率>8 × $\times $10 −6 yr−1）。台湾西部山麓南部的高应变率分布于沿着几个主要断层系统，揭示了台湾西部变形前缘的几何形态。我们的研究结果有助于识别台湾西南部和北部的活动断层，以前没有发现。这些发现可以为未来的地震灾害模型提供信息。
Interseismic deformation describes the gradual accumulation of crustal strain within the tectonic plate and along the plate boundaries before the sudden release as earthquakes. In this study, we use 5 years of high spatial and temporal geodetic measurements, including Global Navigation Satellite System and Interferometric Synthetic Aperture Radar to monitor 3‐dimension interseismic crustal deformation and horizontal strain rate in Taiwan. We find significant deformation (strain rate >8 × $\times $ 10−6 yr−1) along the plate boundary between the Philippine Sea and the Eurasian Plates in east Taiwan. The high strain rate in the southern part of the Western Foothills is distributed along a few major fault systems, which reveals the geometry of the deformation front in west Taiwan. Our results help identify active faults in southwest and north Taiwan that were not identified before. These findings can be insightful in informing future seismic hazard models.