Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Determination of the Earthquake Epicenter from Line-of-Sight Displacement Images Obtained by Sentinel-1A/B Radar Data Using the GMTSAR Software Package

Version 1 : Received: 15 January 2021 / Approved: 18 January 2021 / Online: 18 January 2021 (09:58:01 CET)

How to cite: Akhmadiya, A.; Moldamurat, K.; Nabiyev, N.; Kismanova, A. Determination of the Earthquake Epicenter from Line-of-Sight Displacement Images Obtained by Sentinel-1A/B Radar Data Using the GMTSAR Software Package. Preprints 2021, 2021010312 (doi: 10.20944/preprints202101.0312.v1). Akhmadiya, A.; Moldamurat, K.; Nabiyev, N.; Kismanova, A. Determination of the Earthquake Epicenter from Line-of-Sight Displacement Images Obtained by Sentinel-1A/B Radar Data Using the GMTSAR Software Package. Preprints 2021, 2021010312 (doi: 10.20944/preprints202101.0312.v1).

Abstract

This article described the technology of determining earthquake epicenter with radar remote sensing on the example of Sentinel-1A/B. To determine the epicenter of the earthquake, the Earth's crust displacements were analyzed using radar remote sensing data obtained for the ascending and descending flight orbits. Coordinates of Earthquake epicenters were found according to line-of-sight displacement images via its maximum value. Displacement of the Earth's crust was obtained by processing in the GMTSAR package in the VirtualBox virtual machine of the Linux Ubuntu 16.04 operation system. Two earthquakes that occurred in 2020 were studied to determine the accuracy of finding epicenters using the ascending and descending orbits Sentinel-1A/B. These earthquakes occurred in Western Xizang, China, and Doganyol, Turkey. The maximum deviation from the officially registered epicenter coordinates was 15.38 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.

Keywords

displacement; radar image processing; phase difference; interferometry; earthquake epicenter

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