Abstract: The rapid determination of the seismogenic fault plane after a large earthquake has important reference value for the determination of post-earthquake seismic activity trend. In this study, firstly, the source mechanism data of the 2024 Wushi Ms7.1 earthquake sequence in Xinjiang, China were collected, the central solution for multiple source mechanism solutions of the same earthquake are estimated, and the focal mechanism nodal plane clustering analysis are performed. The two clusters are obtained after removing the noise point of nodal plane, in which the cluster with smaller standard deviation may be the seismogenic fault plane of the M_S7.1 earthquake. Then, in order to further verify the possible seismogenic fault plane through the relationship of the fault plane and the stress field, we collected the historical seismic source mechanism data in Wushi earthquake source region, and inverted the tectonic stress field. The stress field shows northwest-southeast compressive stress and near-vertical tensile stress. By projecting the stress field onto the two cluster centroid of nodal planes obtained from clustering analysis, it was found that the cluster centroid of nodal planes with less standard error subject larger shear stress, and the normal stress also supports its rupture. Comprehensive analysis with other information, we preferred the seismogenic fault of the 2024 Wushi M_S7.1 earthquake is and north-west dipping, low dip angle fault with strike of 245.14°and the dip of 45.67°.

Key words: The 2024 Wushi M_S7.1 earthquake, Focal mechanism, Stress field, Seismogenic faults