Abstract：Based on Sentinel-1A ascending and descending data and D-InSAR, the coseismic deformation field of the Luding MS6.8 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.
YAN Bingdun,YIN Haitao,FENG Bing et al. Source Parameters and Slip Distribution of the Luding MS6.8 Earthquake in 2022 Constrained by InSAR Data[J]. jgg, 2023, 43(3): 221-225.
