摘要
基于Sentinel-1A升降轨数据,使用D-InSAR反演泸定M_(S)6.8地震同震形变场。首先基于弹性半空间位错模型反演地震震源参数,然后利用分布滑动模型确定断层面上的滑动分布,最后计算周边断层的静态库仑应力变化。结果表明,此次地震造成的雷达视线向最大形变量约为18 cm,同震位错以左旋走滑为主,主要发生在6~24 km深度,最大滑动量约为2.5 m,位于16 km深度,发震断层主要为鲜水河断裂。静态库仑应力触发关系显示,鲜水河断裂南段和安宁河断裂北端的库仑应力显著增强,强震趋势值得关注。
Based on Sentinel-1A ascending and descending data and D-InSAR, the coseismic deformation field of the Luding M_(S)6.8 earthquake is obtained. The source parameters of the earthquake are inverted based on the elastic half-space dislocation model, the slip distribution on the fault plane is determined by using the distributed slip model, and the static Coulomb stress change of the coseismic dislocation to the surrounding faults is calculated. It is shown that the maximum deformation cause by the earthquake is about 18 cm in the direction of radar line of sight(LOS). The coseismic dislocation is mainly left-lateral strike-slip at the depth of 6-24 km. The maximum slip is about 2.5 m at the depth of 16 km and the main seismogenic fault is the Xianshuihe fault. The static Coulomb stress triggering relationship shows that the Coulomb stress of the southern segment of Xianshuihe fault and the northern end of Anninghe fault increases significantly, and the strong earthquake trend is worthy of attention.
作者
颜丙囤
殷海涛
冯兵
冯恩国
刘保华
李峰
YAN Bingdun;YIN Haitao;FENG Bing;FENG Enguo;LIU Baohua;LI Feng(Liaocheng Earthquake Monitoring Center of Shandong Earthquake Agency,24 South-Zhonghua Road,Liaocheng 252001,China;Shandong Earthquake Agency,20 East-Wenhua Road,Ji’nan 250014,China;The Second Monitoring and Application Center,CEA,316 Xiying Road,Xi’an 710054,China)
出处
《大地测量与地球动力学》
CSCD
北大核心
2023年第3期221-225,共5页
Journal of Geodesy and Geodynamics
