Abstract:To address the modern requirements of emergency response efforts in the digital age, we developed an approach based on the stochastic finite fault method. Specifically, utilizing an underground three-dimensional velocity structure model and vS30 data from the Menyuan region of the Qinghai Province, we applied the step-by-step iterative ray-tracing method, phase spectrum of Green's function displacement analytical solution, and finite fault method to record strong ground motion simulation data incorporating ground surface amplification effects. Furthermore, considering the Menyuan M6.9 earthquake that struck the Qinghai Province on January 8, 2022, we created simulation maps depicting the peak ground acceleration (PGA) and intensity distributions within the study area. Subsequently, comparing the simulated results with actual PGA records from monitoring stations and field survey intensity data revealed consistent intensity zonation scopes. Moreover, these results validated the utility of the proposed method for rapid assessments of future earthquake disasters, offering valuable insights for postdisaster emergency rescue efforts.
