摘要
2021年5月21日云南漾濞县发生MS6.4级地震,为快速了解和掌握地震对地表形变造成的影响,利用Sentinel-1卫星获取的两景震前和震后的降轨数据,采用二轨法D-InSAR差分技术,对云南漾濞5.21 MS6.4地震诱发的地表变化进行快速探测,识别出4个较大的形变区域,探测出此次地震造成卫星视线方向(LOS)的最大地表抬升值和沉降值分别为8.8 cm和8.0 cm,初步发现卫星视线方向(LOS)地表形变变化最大的区域主要分布在最大震级震中的东南侧。最后结合余震分布信息的空间叠加和典型形变区的剖面图绘制及曲线特征,对典型形变区进行定量分析,结果表明利用D-InSAR探测出的形变区与余震点位具有较大的空间关联性,实证了利用D-InSAR差分技术,对地震诱发的地表形变进行快速探测的可行性。
On May 21,2021,an earthquake with MS6.4 occurred in Yangbi County,Yunnan Province.In order to quickly understand and grasp the impact of the earthquake on the surface deformation,using the deorbitation data before and after the two earthquakes obtained by sentinel-1 satellite.The Two-track method D-InSAR quickly detects the surface changes induced by the 5.21 Ms6.4 earthquake in Yangbi,Yunnan,identifies 4 large deformation areas.The results show that the maximum surface uplift and subsidence in Los are 8.8cm and 8.0cm respectively..It is preliminarily found that the areas with the largest changes in the satellite line of sight(LOS)surface deformation are mainly located on the southeast side of the epicenter of the largest magnitude.Finally,combined with the spatial superposition of the aftershock distribution information and the profile drawing and curve characteristics of the typical deformation area,the typical deformation area is quantitatively analyzed.The result shows that the deformation area detected by D-InSAR has a large spatial correlation with the aftershock location.Demonstrating the feasibility of using D-InSAR differential technology to quickly detect earthquake-induced surface deformation.
作者
朱智富
甘淑
袁希平
张晓伦
黄志豪
Zhu Zhifu;Gan Shu;Yuan Xiping;Zhang Xiaolun;Huang Zhihao(Faculty of Land Resources Engineering,Kunming University of Science and Technology,Kunming 650093,China;Application Engineering Research Center of Plateau and Mountainous Spatial Information Surveying and Mapping Technology in Yunnan Universities,Kunming 650093,China;Key Laboratory of Cloud Data Processing and Application of Mountain Scenic Spot in Yunnan Universities,West Yunnan University of Applied Technology,Dali 671006,China)
出处
《城市勘测》
2022年第2期5-10,共6页
Urban Geotechnical Investigation & Surveying
基金
国家自然科学基金项目(41861054)
云南省教育厅科学研究基金项目(2019J0889)。
