摘要
2022年9月5日四川省甘孜州泸定县发生Ms 6.8地震,提取同震形变场,对指导救灾、地震破裂分析具有重要意义。利用D-InSAR技术基于二轨差分法处理覆盖泸定地震影响范围内的两景Sentinel-1A数据,通过调整处理方法与参数,提取了该地震的同震形变场。结果表明,同震变形区主要分布于鲜水河断裂西侧,以震中为中心,南北分为沉降区与隆升区,雷达视线向最大形变量分别为9.5 cm和17.3 cm。强震变形引发大量次生地质灾害,并易形成地震—崩塌、滑坡—泥石流链式灾害,震中及强变形区应加强次生地质灾害防治及泥石流预防。
On September 5,2022,an Ms 6.8 earthquake struck Luding County,Sichuan Province,China.The extraction of co-seismic deformation field is of great significance for guiding disaster relief and earthquake rupture analysis.The isoseismic defor-mation field of this earthquake was extracted by adjusting the processing method and parameters using D-InSAR technique based on the two-track differential method to process two views of Sentinel-1A data covering the influence area of the earthquake.The results show that the co-seismic deformation area is mainly distributed on the west side of Xianshuihe fault,centered on the epi-center,and divided into subsidence area and uplift area in the north and south.The maximum shape variable of radar line of sight is 9.5 cm and 17.3 cm,respectively.The strong earthquake deformation causes a large number of secondary geological disasters,and is easy to cause earthquake-collapse,landslide-debris flow chain disasters.The prevention of secondary geological disasters and debris flow should be strengthened in the epicenter and strong deformation areas.
作者
韩建锋
焦润成
南赟
赵丹凝
马晓雪
倪璇
马驰
HAN Jianfeng;JIAO Runcheng;NAN Yun;ZHAO Danning;MA Xiaoxue;NI Xuan;MA Chi(Beijing Institute of Geological Hazard Prevention,Beijing 100120,China)
出处
《城市地质》
2023年第1期104-109,共6页
Urban Geology
基金
北京市地质矿产勘查院公益项目(11000022T000001362678、11000022T000000439510、11000022T000000439502)资助。
关键词
泸定地震
D-INSAR技术
同震形变
灾害防治
Luding earthquake
D-InSAR technique
co-seismic deformation
Disaster prevention and control
