新疆喀什地区地震研究

基于 INSAR 的新疆喀什地区地震研究摘要为研究新疆喀什地区伽师县北部 2020 年 1 月 19 日发生的地震对该地区的影响，对地震区域使用 D-InSAR 技术进行干涉测量，获取震区的地表变化信息。在 SARscape 软件下通过引入欧洲航天局公布的 4 景 Sentinel-1A 雷达影像，以及相对应的 21 天精密轨道参数文件和震区的 SRTM-3 version4 数据,从空间和地面两个方面减小数据处理过程中的误差，提高震区测量精度。研究结果表明，此次地震造成的地表形变以抬升为主，震区的断层破裂性质是以逆冲推覆为主，兼具少量走滑运动。升、降轨影像对经过处理后得到的同震形变场并不完全相同，但总体的变化趋势是相同的。此次地震对吐和高速公路、314 国道及玉代克力克乡、古勒鲁克乡等乡镇影响较大。利用哨兵卫星SAR 数据对震区进行形变测量，可以得到较好的干涉结果。关键词：地震；哨兵卫星；合成孔径雷达干涉测量；合成孔径雷达差分干涉测量；两轨法 AbstractIn order to study the impact of the earthquake on January 19, 2020 in the north of Jiashi County, Kashgar, Xinjiang, the interferometric measurement of the earthquake area using D-InSAR technology was obtained Data of surface shape variable in earthquake area. Under the SARscape software, by introducing 4 scenes of Sentinel-1A radar images provided by the European Space Agency, and the corresponding 21-day precision orbit parameter file and SRTM version 4 data of the earthquake zone, the data processing process is reduced from both space and ground aspects Error, improve the measurement accuracy of the earthquake zone. The results show that the surface deformation caused by the earthquake is mainly uplift, and the fault rupture is mainly thrust nappe, with a small amount of strike slip. The ascending and descending orbit images are not identical to the coseismic deformation field obtained after processing, but the overall change trend is the same. It has a great influe-nce on Tuhe Highway, China National Highway 314...