Tectonic geomorphology of the Çardak Fault surface rupture associated with the February 6, 2023 Kahramanmaraş-Ekinözü earthquake (Mw 7.6)

Öz

On February 6, 2023 at 13:24, an earthquake with a moment magnitude of 7.6 (Mw) occurred on the left-lateral strike-slip Çardak Fault. This earthquake, which created a 105 km long surface rupture on the Çardak Fault, could be traced and mapped from Göksun district of Kahramanmaraş province to Bıçakçı in Doğanşehir district of Malatya province in the east. The surface rupture produced left-lateral offsets of up to 8 meters and vertical displacements of 3-5 meters, which reflect the character of the fault. Within the Çardak Fault zone, surface deformations such as lateral spreads, pull-apart basins, fault scarps, and mole tracks also developed. The surface rupture of the Çardak Fault was firstly detected by the General Directorate of Mapping (GGM) with aerial photographs and satellite images taken after the earthquake and then confirmed by field works conducted between February 14-20 and 26-27, 2023. The geomorphologic traces of the fault were precisely measured and mapped from the ground with laser meters and from the air with unmanned aerial vehicles (UAVs). In addition, the data collected in the study were stored in the cloud environment as a geographic data service and made available to researchers with web-based maps (Cbskampus, 2023).

Anahtar Kelimeler

• Çardak Fault
• Surface rupture
• Tectonic geomorphology
• Web-based mapping
• UAV

6 Şubat 2023 Kahramanmaraş-Ekinözü depremi (Mw 7.6) ile ilişkili Çardak Fayı yüzey kırığının tektonik jeomorfolojisi

Öz

6 Şubat 2023 saat 13:24’te moment büyüklüğü 7.6 (Mw) olan Ekinözü depremi, sol yanal atımlı Çardak Fayı üzerinde gerçekleşmiştir. Çardak Fayı üzerinde 105 km uzunluğunda yüzey kırığı oluşturan bu deprem, Kahramanmaraş ilinin Göksun ilçesinden doğuda Malatya ilinin Doğanşehir ilçesine bağlı Bıçakçı’ya kadar takip edilebilmiş ve haritalanmıştır. Deprem sonucunda oluşan yüzey kırığı üzerinde fayın karakterini yansıtan 8 metreye varan sol yanal ötelenmelerin yanı sıra 3-5 metre düşey atımların da geliştiği saptanmıştır. Çardak Fay Zonu içerisinde yüzey kırığı ile birlikte yanal yayılmalar, çek-ayır havzalar, fay diklikleri ve köstebek yapıları gibi yüzey deformasyonları da gelişmiştir. Çardak Fayı’nın yüzey kırığı ilk olarak Harita Genel Müdürlüğü (HGM) tarafından deprem sonrası çekilen hava fotoğrafları ve uydu görüntüleri ile tespit edilmiş ve sonrasında 14-20 ve 26-27 Şubat 2023 tarihleri arasında yapılan arazi çalışmaları ile teyit edilmiştir. Fayın jeomorfolojik izleri lazermetre yardımıyla yerden, insansız hava araçları (İHA) ile havadan hassas bir şekilde ölçülerek haritalandırılmıştır. Ayrıca çalışmada toplanan veriler coğrafi veri servisi olarak bulut ortamında depolanarak web tabanlı haritalar (Cbskampus, 2023) ile araştırmacıların kullanımına sunulmuştur.

Anahtar Kelimeler

• Çardak Fayı
• Yüzey kırığı
• Tektonik jeomorfoloji
• Web tabanlı haritalama
• İHA

Kaynakça

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