Abstract：For the first time, we construct a three-dimensional finite element model for the 2021 Madoi MW7.3 earthquake to analyze the features of coseismic slip distribution. First, we process the high-precision GNSS coseismic deformation observations. Then, we construct a three-dimensional finite element model, which is validated by the elastic half-space Okada model. Finally, we invert the coseismic slip distribution model of the Madoi earthquake using the least squares method, by constraining 40 near-field and far-field GNSS coseismic displacement observations. The results show that the Madoi earthquake reptures with a maximum value of about 3.4 m are mainly distributed near the area of Yematan and Huanghe country. The results are consistent with the field investigation and can well explain the GNSS coseismic deformation observations.
ZHANG Caihong,TAN Kai,LU Xiaofei et al. Three-Dimensional Finite Element Simulation Analysis of Coseismic Slip Distribution of Madoi MW7.3 Earthquake[J]. jgg, 2023, 43(1): 42-45.
