February 6, 2023 Mw 7.7 Pazarcık earthquake: characteristic features of the surface rupture along the Çakmak Fault (Adıyaman-Gölbaşı-Akçabel)

Year 2025, Volume: 15 Issue: 3, 653 - 666, 15.09.2025

Elif Akgün , Mustafa Softa

https://doi.org/10.17714/gumusfenbil.1652545

Abstract

This study examines in detail the surface rupture observed between the Gölbaşı district of Adıyaman province and Akçabel town, which resulted from the February 6, 2023, Kahramanmaraş/Pazarcık (Mw: 7.7) earthquake along the East Anatolian Fault System. The deformation along the surface rupture, identified through 1:25,000 scale mapping and field studies, was measured in terms of left-lateral displacement and vertical slip values. These measurements were interpreted in conjunction with a stress state analysis based on instrumental earthquake data. The studies conducted on the surface rupture revealed the following findings: (i) the surface rupture, mapped over approximately 15 km between the Gölbaşı district of Adıyaman province and Akçabel town, aligns with the Çakmak fault defined in this study; (ii) the largest left-lateral displacement and vertical slip values observed along the surface rupture were 425 cm and 102 cm, respectively, near Çakmak town; and (iii) stress analysis indicated that the fault underwent deformation due to the influence of a WNW-ENE extensional force and NNE-SSW compression, consistent with a transtensional tectonic regime.

Keywords

East Anatolian Fault System , Çakmak fault , Pazarcık earthquake , Surface rupture

6 Şubat 2023 Mw 7.7 Pazarcık depremi: Çakmak Fayı (Adıyaman-Gölbaşı-Akçabel) boyunca yüzey kırığının karakteristik özellikleri

Abstract

Bu çalışmada, Doğu Anadolu Fay Sistemi üzerinde gerçekleşen 6 Şubat 2023 Kahramanmaraş/Pazarcık (Mw: 7.7) depremine bağlı olarak Adıyaman ili Gölbaşı ilçesi ile Akçabel beldesi arasında net bir şekilde izlenen yüzey kırığı detaylı şekilde incelenmiştir. 1/25.000 ölçekli haritalama ve arazi çalışmalarıyla tespit edilen yüzey kırığı boyunca gelişen deformasyon sol yanal yer değiştirme miktarları ve düşey atım değerleri ile ölçülerek, fayın aletsel dönem deprem verilerine dayalı gerilme durumu analizi ile birlikte yorumlanmıştır. Yüzey kırığı üzerinde gerçekleştirilen çalışmalarda, (i) Adıyaman ili Gölbaşı ilçesi ile Akçabel beldesi arasında ~15 km haritalanan yüzey kırığının bu çalışmada tanımlanan Çakmak fayını izlediği, (ii) yüzey kırığının üzerinde gözlenen en büyük sol yanal yer değiştirmenin ve düşey atım değerlerinin Çakmak beldesi yakınlarında sırasıyla 425 cm ve 102 cm olarak ölçüldüğü, (iii) stres analizleri sonucunda fayın BKB-DKD yönlü gerilme kuvveti ve KKD-GGB yönlü sıkışma etkisi altında transtansiyonel tektonik rejim etkisinde deforme olduğu saptanmıştır.

Keywords

Doğu Anadolu Fay Sistemi , Çakmak fayı , Pazarcık depremi , Yüzey kırığı

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