Abstract：Based on GPS displacements, we apply the finite fault method to inverse the slip distribution of the 2022 Taiwan MW6.9 earthquake. The results show that the earthquake ruptured to the surface, and the slip is dominated by strike-slip with a reverse component. It mainly extends along the fault in the NNE direction. There are two rupture concentrated areas, and the total released seismic moment is about 5.73×1019 Nm. Based on the analysis of the GPS observations and dislocation theoretical model, we infer that the coseismic deformation generally conforms to the regional tectonic movement characteristics of the east coast of Taiwan island. The subduction of the Eurasian plate by the Philippine sea plate is the main source of power for the Central Range fault activity.
