Analysis of Surface Fault-Rupture Characteristics Resulting from the 6 February 2023 (Mw:7.6) Ekinozu Earthquake along the Ciglik Fault (Malatya-Dogansehir-Eskikoy)

Öz

In this study, we analyze the surface rupture caused by the Kahramanmaras/Ekinozu (Mw: 7.6) Earthquake of February 6, 2023, along the Eastern Anatolian Fault Zone. The rupture, observed between the Doğansehir district and Eskikoy town in Malatya province, was mapped at a scale of 1/25000. Additionally, we investigate the deep continuation of the rupture and quantify the resulting deformation. Our aim is to determine the width of deformation and vertical displacements, providing insights into its complex features. In surface rupture studies, it was determined that (i) the approximately 11 km mapped surface rupture between Malatya province's Doğansehir district and Eskikoy town aligns with the previously identified Ciglik fault, (ii) the deformation width of the surface rupture ranges from 3.4 meters to 8.3 meters, with the most significant left-lateral displacement observed near the town of Ciglik reaching 95 cm, concurrently with a vertical displacement of 75 cm.

Anahtar Kelimeler

• East Anatolian Fault Zone
• Ciglik Fault
• Kahramanmaras (Ekinozu) Earthquake
• Surface fault-rupture

6 Şubat 2023 (Mw:7.6) Ekinözü Depremi Yüzey Kırığının Çığlık Fayı (Malatya-Doğanşehir-Eskiköy) Boyunca Karakteristik Analizi

Öz

Bu çalışmada, Doğu Anadolu Fay Zonu üzerinde meydana gelen 6 Şubat 2023 deprem çiftinden Kahramanmaraş/Ekinözü (Mw: 7.6) Depreminin oluşturduğu, Malatya ili Doğanşehir ilçesi ve ilçeye bağlı Eskiköy beldesi arasında net izlenen yüzey kırığı 1/25000 ölçeğinde haritalanarak, kırığın derindeki devamının, deformasyon genişliğinin ve düşey atımının tespit edilmesi amaçlanmıştır. Yüzey kırığı üzerinde gerçekleştirilen çalışmalarda, (i) Malatya ili Doğanşehir ilçesi ile Eskiköy beldesi arasında ~11 km haritalanan yüzey kırığının daha önce tanımlanmış Çığlık fayını izlediği, (ii) yüzey kırığının deformasyon genişliğinin 3.4 metre ile 8.3 metre arasında değiştiği ve gözlenen en büyük sol yanal yer değiştirmenin Çığlık beldesi yakınlarında 95 cm ve aynı zamanda düşey atımın 75 cm’e ulaştığı saptanmıştır.

Anahtar Kelimeler

• Doğu Anadolu Fay Zonu
• Çığlık fayı
• Kahramanmaraş (Ekinözü) depremi
• Yüzey kırığı

Kaynakça

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