Abstract：Based on the near-field InSAR deformation of Sentinel-1 and ALOS-2, this paper uses the finite fault method to invert the source rupture slip distribution of the January 8, 2022, Menyuan MW6.6 earthquake. The results show that the maximum slip of the earthquake is about 3.65 m, and the released seismic moment is about 1.56×1019 Nm. The rupture propagates to the surface and is divided into east and west sections,. The rupture slip extends from the epicenter to the SEE and NWW along the fault, and the fault slip is larger on the southeast side of the epicenter. Different from other studies, we propose that ruptures mainly occur in the shallow part of the eastern section, no more than 8 km, and the rupture on the western section can be as deep as 15 km. The coseismic deformation is generally consistent with the characteristics of left-lateral strike-slip rupture, showing the relative motion characteristics of the blocks in the Tibetan plateau.
