Obtaining Coseismic Deformation Field of Jiuzhai Earthquake with Sentinel-1A

Based on C-band SAR data of Sentinel-1A satellite，two-pass Differential Interferometric Synthetic Aperture radar (D-InSAR) method was applied for analyzing the ground displacement due to the August 8，2017 Jiuzhaigou MS 7.0 earthquake shock.It obtained the study area coseismic deformation field.The interference results show that the earthquake caused obvious surface deformation，and the maximum uplift in the scenic area reached 12.6 cm，and the maximum settlement was 9.8 cm.The results show that the C-band radar data of Sentinel-1A satellite is very suitable for the detection of D-InSAR deformation in areas with dense vegetation and complex terrain.The ground deformation information obtained by D-InSAR technology can be used to analyze and discuss the scope of earthquake disaster and the mechanism of earthquake.The important status of D-InSAR technology in the field of large scale surface deformation detection and geoscience research are further clarified.