Выпуск: 16 , Том: 51 , Год издания: 2024

Two major earthquakes of Mw7.8 and Mw7.5 ruptured the Southern East Anatolian Fault (SEAF)and the Savrun-Cardak-Surgu fault (SCSF), devastating southeast Turkiye and northwest Syria on 6 February2023. We adopt innovative nonlinear and linear approaches to analyze the coseismic ground displacements andestimate the complex slip geometry. Unlike conventional analytical solutions that simplify crust heterogeneity, finite-element fault models invert the displacement data and simulate the dual-fault geometry with non-uniformly distributed shallow crustal materials. Our results suggest the west-dipping SEAF and north-dippingSCSF accommodate earthquake slips of >10 m. Their respective slip distributions and proximal aftershockscorrelate spatially with local seismic velocity anomalies (i.e., ΔVp and ΔVs), which implies differences instructural control along these two faults and provides insights into assessing the seismic hazard of mixedincipient-mature fault systems