Abstract We use the composite source model to simulate the strong ground motion of the 2017 Jiuzhaigou MS7.0 earthquake, generating a specific circular subevent distribution with kinematic model of fault rupture. After parameter sensitivity analysis of seismic moment, stress drop, rupture velocity, sub-fault size and focal depth, we obtain a set of reasonable focal parameters. Based on the composite source model, we calculate the ground motion in this area, comparing it with observed data such as peak ground acceleration(PGA), response spectrum and PGA distribution characteristics. The results of simulations show that the calculated ground motion waveform is very close to the observed data. This verifies the validity of the composite source model in calculating strong ground motion; the sensitivity law also provides a basis for the composite source model to calculate the change interval of ground motion parameters in areas lacking strong motion records.
LI Minghui,JING Yueling,ZHANG Yuxuan et al. Strong Ground Motion Simulation and Parameter Sensitivity Analysis of the Jiuzhaigou MS7.0 Earthquake[J]. jgg, 2022, 42(10): 1025-1033.
LI Minghui,JING Yueling,ZHANG Yuxuan et al. Strong Ground Motion Simulation and Parameter Sensitivity Analysis of the Jiuzhaigou MS7.0 Earthquake[J]. jgg, 2022, 42(10): 1025-1033.