Co-Seismic Inversion and Post-Seismic Deformation Mechanism Analysis of 2019 California Earthquake

In July 2019, a series of seismic events, including magnitude (Mw) 7.1 mainshock and Mw 6.4 foreshock, occurred in Eastern California. Studying these events can significantly improve our understanding the California tectonic environment. Sentinel-1A ALOS-2 PALSAR images were utilized to obtain co-seismic deformation fields, foreshock deformation. The Okada elastic dislocation model ascending descending orbit results used invert slip distribution focal mechanism solution. Using images, time-series was obtained for 402 d after earthquake, evolution analyzed. maximum uplift caused by reached 1.5 m line sight (LOS), subsidence 1 LOS. For area remained active, its dominated after-slip. inversion illustrated that earthquakes mainly strike-slip. approximately 7.08. Coulomb stress change moment 4.24 × 1026 N m, which is 7.06. This finding consistent with results.