Application of GMTSAR and ESA SNAP Software to Determine Earthquake Epicenter Coordinate Using Sentinel-1A/B Radar Remote Sensing Data

This article has described the technology of determining earthquake epicenter with radar remote sensing on the example of Sentinel-1A/B using free available GMTSAR package and ESA SNAP software, unlike other commercial software. The combined use of the ESA SNAP and GMTSAR programs makes it possible to process data faster with minimal cost for geophysicists to determine earthquake epicenter coordinates and zones. Coordinates of Earthquake epicenters were found according to displacement via its maximum value. Displacement of the Earth's crust was obtained by processing in the GMTSAR package. ESA SNAP software was exploited for visualization and determination of exact coordinates. Two earthquakes that occurred in 2020 were studied first time to determine the accuracy of finding epicenter coordinates with ascending and descending orbits. These earthquakes occurred in Western Xizang, China, and Doganyol, Turkey. The maximum deviation from the officially registered epicenter coordinates was 16.3 km for Doganyol and 3.2 km for the Western Xizang earthquake. The negative displacement was 90 mm for Doganyol and 50 mm for Western Xizang, which is proportional magnitude M6.7 and M6.3.