Source Parameter Inversion of Moderate to Strong Earthquakes and Its Comparison with Earthquake Catalogs in Tibetan Plateau based on InSAR Observations

Objectives: Synthetic aperture radar interferometry (InSAR) is capable of high spatial resolution and deformation monitoring accuracy. It can effectively constrain the source parameter of moderate shallow earthquakes. Methods: In this study, using InSAR phase stacking and the Bayesion inversion methods, we construct the source parameters catalog for 42 moderate to strong(Mw 4.8-6.6) earthquakes that occurred in the shallow crust of the Tibetan Plateau from October 2014 to October 2022 . Results: The results demonstrate that the InSAR-derived depth location is shallower than the centroid depth recorded in general seismic catalogs. The location of the epicenter of the Global Centroid Moment Tensor (GCMT) catalog is systematically biased. It also reveals the result of InSAR inversion can express the geometry of fault more precisely. Conclusions: The study shows that the InSAR-derived catalog is a significant supplement to the existing global catalog and can improve empirical scale relationships, facilitating scientific reference for regional seismic risk assessment.