Utilization of sentinel satellite for vertical deformation monitoring in Semangko fault-Indonesia

Vertical deformation is a change in the surface of the ground that occurs vertically in a certain time. Vertical deformation often occurs in areas with active fault conditions that move vertically or in a mixture. Deformation can be measured by terrestrial or non-terrestrial measurements. One method of non-terrestrial measurement is to use satellite imagery. In this study using Sentinel satellite images. This study aims to utilize Sentinel images in monitoring deformation in the Semangko fault. The Semangko fault is located along the Sumatera island, Indonesia. This fault is one of the most active faults in the world. This fault center is located in the northern part of Lake Singkarak, Tanah Datar Regency. In this region large-scale earthquakes often occur and trigger the movement of faults on other islands and also trigger volcanic activity along the �Barisan Hill� area which is the ring of fire in Sumatera island. Sentinel images can be obtained data every 6-12 days. This facilitates deformation with the differential interferometry SAR (DinSAR) method. Sentinel images used is a minimum of two time periods. Sentinel imagery is suitable for deformation monitoring because the baseline length is >400. Vertical deformation is obtained after the DinSAR process which includes initial correction of image data, interferogram, fringe, phase conversion to height value, and measuring deformation. The results of this vertical deformation can be used for various survey mapping applications such as dynamic DEM, fault mapping, spatial plan, etc. © 2021 Elsevier B.V., All rights reserved.