Detailed Slip Distribution Model of the Türkiye-Syria 2023 Seismic Event exploiting SAOCOM-1, Sentinel-1 and ALOS-2 Satellite Imagery.

In 2023, seismic activity of considerable magnitude occurred along the Türkiye-Syria border, characterised by an Mw 7.8 earthquake on the 6th of February and was followed by an Mw 7.5 event, nine hours later. These earthquakes, which are the strongest recorded in recent years, resulted in over 50,000 casualties and are related with the activity of the East Anatolian Fault Zone —a 600 km-long plate boundary where the Arabian and Anatolian plates meet. To analyse these seismic events, we leveraged data from diverse satellites, including SAOCOM-1, Sentinel-1, and ALOS-2. Employing InSAR techniques, such as conventional interferometry and Pixel Offset tracking, we assessed surface deformations caused by the events. The high-resolution Synthetic Aperture Radar displacement results underwent non-linear and linear inversions, enabling the creation of detailed variable slip fault models. A meticulous multiscale sampling approach was applied, that facilitated a comprehensive examination of the tectonic structures triggering these events. The fault zone exhibited a pronounced left-lateral strike-slip character, with components of dip-slip movements observed in specific segments. Additionally, we capitalised the detailed slip models, to estimate the distribution of the intensity of ground motions in the affected region.