Deformation Mapping After Pasaman Earthquake Using Sentinel-1 Imagery

Abstract West Pasaman is one of the regency regions in the province of West Sumatra and is located at the intersection of the Mentawai and Sumatra faults, the tectonic activity that causes earthquakes. According to BMKG, on February 25, 2022, a large earthquake disaster with a magnitude of 6.1 and a depth of 10 km occurred. Earthquakes can cause deformation. However, a deformation map of the West Pasaman Regency has not been mapped. In this study, deformation mapping using the Differential Interference Aperture Radar (DInSAR) method used two Sentinel-1 images acquired in January as the Image of the Master and the Image of a slave in March. The research results show that the deformation values in the West Pasaman Regency range from -0.038 m to +0.075 m. post-earthquake deformation studies are expected to inform the location of vulnerable areas for mitigation efforts.