Akademik Veri Yönetim Sistemi
ACTA GEOPHYSICA, 2024 (SCI-Expanded, Scopus)
Nine hours apart, two catastrophic earthquakes (Mw 7.8 and 7.6) occurred on 6 February 2023, in eastern T & uuml;rkiye. The mainshocks destroyed several cities and villages in 11 provinces, including Kahramanmara & scedil;, Hatay, Ad & imath;yaman, Malatya, Adana and Gaziantep. Over about 50,000 aftershocks were detected in the nine months. Because the resolution of hypocentral locations in the Turkish national earthquake catalogs is limited, about 31,000 events are relocated using the double-difference method in this study. The aftershock distribution and its relation to energy release on the faults and Coulomb stress change areas are investigated. The improved hypocenters give a clearer image to understand the activity on the faults. The event distribution indicates that the rupture of the first mainshock in Pazarc & imath;k (Mw 7.8) propagates unilaterally on the northernmost segment of the Dead Sea Fault Zone and then transfers to the East Anatolian Fault Zone at the Mara & scedil; Triple Junction. The bilaterally extending rupture causes dense aftershock activity on the fault zone from Samanda & gbreve; to P & uuml;t & uuml;rge. The second mainshock in Elbistan (Mw 7.6) was triggered because of the positive Coulomb stress change on the & Ccedil;ardak fault, which generates dense clusters at both ends of the fault. It is observed that a high number of aftershocks occur on the low slip patches, and the high-energy release areas have low activity because of the stress equilibrium on the fault surfaces.