Abstract:Based on the stochastic finite fault simulation method, 9 triggered strong motion earthquake stations within 100 km near field of the 2022 Luding earthquake in Sichuan were selected to simulate the strong motion. According to the principle of minimum residual between the measured and simulated, the reasonable input parameters for the simulation of the strong motion are determined, and the spatial distribution characteristics of the peak acceleration of the earthquake are obtained. The results show that, except for JLT station, the peak acceleration and response spectrum simulation results fit well with the actual observation in the period of 0.05 to 1 s. The amplitude and the spectral shape are similar, and the ground motion can be predicted well. The Luding seismic intensity map based on the simulation results is consistent with the published instrument intensity map, and the long axis of the isoseismic line shows a NW-SE direction.
WANG Yujie,ZHANG Lifen,SUN Xiaodan et al. Near-Field Strong Motion Simulation of the 2022 Luding MS6.8 Earthquake in Sichuan Province[J]. jgg, 2023, 43(5): 441-446.