Coseismic Faulting Model and Post-Seismic Surface Motion of the 2023 Turkey–Syria Earthquake Doublet Revealed by InSAR and GPS Measurements

On 6 February 2023 (UTC), an earthquake doublet, consisting of the Mw 7.8 Pazarcik and 7.5 Elbistan earthquake, struck south-central Turkey northwestern Syria, which was largest that occurred in since 1939 Erzincan earthquake. The faulting model this estimated based on coseismic InSAR GPS displacements. In addition, best-fitting indicates both were controlled by predominated left-lateral strike-slip motion, with slip peaks 9.7 m 10.8 m, respectively. Coulomb failure stress (CFS) change suggests has a positive effect triggering rupture seismogenic fault Furthermore, these two main shocks promoted occurrence 6.3 strong aftershock. Additionally, it is found Turkey-Syria doublet increased risk Puturge segment EAF northern Dead Sea Fault (DSF). It crucial to note DSF not experienced large several centuries, highlighting need for heightened attention potential seismic hazard segment. Finally, deformation zone adjacent identified, potentially attributed motion blind submarine fault.