PURE AND APPLIED GEOPHYSICS, vol.179, no.2, pp.587-598, 2022 (SCI-Expanded)
The East Anatolian Fault Zone in Turkey produced a major earthquake (Mw 6.8) on 24 January 2020. In this study, we analyze the displacements of Global Navigation Satellite Systems (GNSS) stations. We also use the interferometric synthetic aperture radar (InSAR) technique to determine deformation caused by the earthquake. For this analysis, interferograms were produced with Sentinel-1 coseismic pairs. The coseismic displacement is about 60 cm as a maximum in the line-of-sight (LOS) direction from ascending and descending tracks. The displacements are modeled with uniform slip modeling to understand the fault mechanism and to estimate the source parameters of the earthquake. In addition, horizontal and vertical displacements are calculated using the decomposition of LOS solutions. According to the InSAR results, the fault length measured 37 km, and the magnitude of the earthquake was calculated as 6.6, not 6.8. The InSAR results were inverted into the elastic half-space model and estimated the earthquake source parameters as follows: depth 17 km, strike 242 degrees, dip 80 degrees, rake 1 degrees.