Three-Dimensional Deformation of the 2023 Turkey Mw 7.8 and Mw 7.7 Earthquake Sequence Obtained by Fusing Optical and SAR Images

In February 2023, Mw 7.8 and 7.7 earthquakes struck southeastern Turkey. Generating a coseismic 3D deformation field that can directly reflect the characteristics of surface is important for revealing movement mode seismogenic fault analyzing focal mechanism. Optical image sub-pixel correlation (SPC) only captures in horizontal direction, SAR pixel offset tracking (POT) obtains range not sensitive to north–south signals. Thus, neither them capture complete alone. Combining may be able allow monitoring deformation. this study, we used Sentinel-2 optical images obtain (east–west north–south) Sentinel-1 ALOS-2 data extract azimuth offsets. The least-squares method was fuse offsets 2023 Turkey earthquake sequence, which indicates two events were both left-lateral strike-slip earthquakes. caused by large mainly east–west direction. vertical small-magnitude uplift subsidence. findings paper as reference study