Fault geometry and kinematics of the 2021 Mw 7.3 Maduo earthquake from aftershocks and InSAR observations

The 2021 Mw 7.3 Maduo earthquake revealed the significant seismic hazard of faults developed within Bayan Har Block eastern Tibet, China (e.g., Kunlun Pass–Jiangcuo Fault). Relocated aftershock data are in good agreement with Interferometric Synthetic Aperture Radar (InSAR) coseismic displacement field and investigations. In this study, we used point cloud fitting to model relocated aftershocks earthquake, obtained detailed geometry characteristics seismogenic fault. Based on InSAR deformation, geometric fault its slip distribution were retrieved. results show that event was shallow (0–10 km) characterized by sinistral strike-slip motion. We identified four asperities along strike; maximum 4.84 m occurred segment fault, an area where strike changed. suggest central main is mature smooth, while western segments complex immature.