Abstract Aiming at the complexity of seismogenic structure of the Nyima MW6.3 earthquake in Tibet on July 23, 2020 (no obvious surface rupture, the tendency of seismogenic fault is controversial), we obtain the coseismic deformation fields based on the ascending and descending orbit Sentinel-1A images. As a constraint, the seismogenic fault activity mode of this earthquake is discussed by setting two groups of possible fault slip models and combining with regional aftershock distribution and geological structure background. On this basis, the slip distribution characteristics of fault plane are further obtained. The results show that the seismogenic fault is a normal fault that dips to NWW located on the east side of the Yibug Caka graben, with a strike angle of 207°, dip angle of 33.1°, average slip angle of -89.27°, and dominated by dip slipping. The earthquake rupture is mainly concentrated at the depth of 5.4-9.3 km along the fault plane (unruptured to the surface), the maximum slip is approximately 1.7 m, and the moment magnitude is 6.3. The occurrence of this earthquake is the result of the current tectonic movement and deformation of the Qinghai-Tibet block.
LIANG Shichuan,QU Wei,CHEN Hailu et al. Source Parameter Inversion and Seismogenic Tectonic of the Nyima MW6.3 Earthquake in Tibet on July 23, 2020 Based on InSAR[J]. jgg, 2022, 42(1): 71-76.
LIANG Shichuan,QU Wei,CHEN Hailu et al. Source Parameter Inversion and Seismogenic Tectonic of the Nyima MW6.3 Earthquake in Tibet on July 23, 2020 Based on InSAR[J]. jgg, 2022, 42(1): 71-76.
