Abstract：Based on Sentinel-1A data, we use differential synthetic aperture radar interferometry (DInSAR) technology to obtain the LOS coseismic deformation field. We retrieve the geometric parameters of the seismogenic fault and fault slip distribution using Bayesian methods (BM) based on sequential Monte Carlo (SMC) sampling. The results show that the strike of seismogenic fault is about 47.810° ±2.218°, the dip angle is about 36.664°±2.499°. The epicenter location is 87.715°E, 34.365°N, and the corresponding depth is 5.673 km. The coseismic slip distribution is concentrated at a depth of 3.9~7.5 km, and the maximum slip is 0.42 m. The average rake angle is -66.598°±3.258°, which indicates that this earthquake is dominated by normal fault with slightly left-lateral strike-slip. The inverted moment magnitude is MW5.5, slightly less than the magnitude published by the USGS.
LI Chengtao,LI Qi,TAN Kai et al. Coseismic Deformation Field and Fault Slip Distribution of the 2021 Shuanghu MS5.8 Earthquake Revealed by InSAR Data[J]. jgg, 2022, 42(2): 153-157.
