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

Yıl 2025, Cilt: 15 Sayı: 3, 653 - 666, 15.09.2025

Elif Akgün , Mustafa Softa

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

Öz

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.

Anahtar Kelimeler

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

Öz

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.

Anahtar Kelimeler

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

Kaynakça

• AFAD, (2025). Presidency of Disaster and Emergency Management, Ankara. Earthquake catalogue, https://deprem.afad.gov.tr/event-catalog [accessed 2025/02/28].
• Akbaş, B., Akdeniz, N., et al. (2011). 1:1.250.000 ölçekli Türkiye jeoloji haritası. Maden Tetkik Ve Arama Genel Müdürlüğü Yayını, Ankara-Türkiye. http://yerbilimleri.mta. gov.tr/.
• Akgün, E. (2024). Kinematic and morphometric evidence for recent reactivation of the Kale-Yeşilyurt fault zone within the East Anatolian Fault System. Journal of Mountain Science, 21(12):4149-4176.
• Akgün, E., & İnceöz, M. (2021). Tectonic evaluation of the central part of the East Anatolian Fault Zone, Eastern Turkey, Turkish Journal of Earth Science, 30(7), 928-947.
• Akgün, E., Softa, M., Çolak Erol, S., Aksoy, E., Gürgöze, S., Koçbulut, F., Sözbilir, H., & Tatar, O. (2025a). The Kinematics of Active Crustal Deformation in the Erkenek Segment of the Eastern Anatolian Fault Zone Using Comprehensive Surface Rupture Analysis from the February 6, 2023, Earthquake (Mw 7.7). Geological Bulletin of Turkey, 68(4):1-40.
• Akgün, E., Topal, S., Softa, M., Nas, M., Gürgöze, S., Sözbilir, H., Aksoy, E., Spencer, J.Q.G., & Yüksel, M. (2025b). Evidence for an aseismic gap between the Mw6.8 Pütürge (Elazığ) and 7.8 Pazarcık (Kahramanmaraş) earthquakes in the east Anatolian fault system, southeast Türkiye. Journal of Structural Geology, 190(2025):105293.
• Aksoy, E., Akgün, E., Softa, M., Koçbulut, F., Sözbilir, H., Tatar, O., & Çolak Erol, S. (2023). 6 Şubat 2023 Pazarcık (Kahramanmaraş) depreminin Doğu Anadolu Fay Zonu Erkenek ve Pazarcık segmentleri üzerindeki etkisi: Çelikhan-Gölbaşı (Adıyaman) arasından gözlemler. Türk Deprem Araştırma Dergisi, 5(1), 85-104.
• Aktuğ, B., Özener, H., Doğru, A., Sabuncu, A., Turgut, B., Halıcıoğlu, K., Yılmaz, O., & Havazlı, E. (2016). Slip rates and seismic potential on the East Anatolian Fault System using an improved GPS velocity field. Journal of Geodynamics, 94, 1-12.
• Ambraseys, N.N. (1989). Temporary seismic, quiescence: SE Turkey. Geophysical Journal of International, 96, 311-331.
• Ambraseys, N.N., & Finkel, C. (1995). The seismicity of Türkiye earthquake of 19 December 1977 and the seismicity of the adjacent areas 1500-1800. Eren Yayıncılık ve Kitapçılık, pp 240.
• Ambraseys, N.N., & Jackson, J.A. (1998). Faulting associated with historical and recent earthquakes in the Eastern Mediterranean region. Geophysical Journal International, 133, 390.
• Arpat, E., & Şaroğlu, F. (1972). Doğu Anadolu Fayı ile ilgili bazı gözlem ve düşünceler. Bulletin of the Mineral Research and Exploration, 73, 1-9.
• Arpat, E., & Şaroğlu, F. (1975). Türkiye’deki bazı önemli genç tektonik olaylar. Geological Bulletin of Turkey, 18(1), 91-101.
• Barka, A.A., & Kadinsky-Cade, K. (1988). Strike-slip fault geometry and its influence on eartquake activity. Tectonics, 7(3), 663-684.
• Çetin, H., Güneyli, H., & Mayer, L. (2003). Paleosismology of the Palu-Lake Hazar segment of the East Anatolian Fault Zone, Turkey. Tectonophysics, 374, 163-197.
• Delvaux, D., & Sperner, B. (2003). New aspects of tectonic stress inversion with reference to the TENSOR program. Geological Society London, Special Publications, 212(1), 75-100.
• Duman, T.Y., & Emre, Ö. (2013). The East Anatolian Fault: geometry, segmentation and jog characteristics. Geological Society, London, Special Publications, 372.
• Görür, N., Oktay, F. Y., Seymen, I., & Şengör, A. M. C. (1984). Palaeotectonic evolution of the Tuzgölü basin complex, Central Turkey: sedimentary record of a Neo-Tethyan closure. Geological Society, London, Special Publications, 17(1), 467-482.
• Gürer, A., Bayrak, M., & Gürer, Ö.F. (2004). Magnetotelluric images of the crust and mantle in the southwestern Taurides, Turkey. Tectonophysics, 391(1),109-120.
• Hardebeck, J.L., & Okada, T. (2018). Temporal stress changes caused by earthquakes: a review. J Geophys Res: Solid Earth, 123(2), 1350–1365.
• Herece, E. (2008). Doğu Anadolu Fay (DAF) Atlası. Maden Tetkik ve Arama Genel Müdürlüğü, Special Publication Series 13.
• Karabacak, V., Özkaymak, Ç., Sözbilir, H., Tatar, O., Aktuğ, B., Özdağ, Ö.C., Çakır, R., Aksoy, E., Koçbulut, F., Softa, M., Akgün, E., Demir, A., & Arslan, G. (2023). The 2023 Pazarcık (Kahramanmaraş, Türkiye) Earthquake (Mw: 7.7): implications for surface rupture dynamics along the East Anatolian Fault Zone. Geological Society of London Collection, 180(3), jgs2023-020.
• Koçbulut, F., Softa, M., Akgün, E., Koşaroğlu, S., & Otlu, N. (2024). 6 Şubat 2023 (Mw:7.6) Ekinözü Depremi Yüzey Kırığının Çığlık Fayı (Malatya-Doğanşehir-Eskiköy) Boyunca Karakteristik Analizi. Türk Deprem Araştırma Dergisi, 6 (2).
• Koçyiğit, A., Yılmaz, A., Adamia, S., & Kuloshvılı, S. (2001). Neotectonics of East Anatolian Plateau (Turkey) and Lesser Caucasus: implication for transition from thrusting to strike-slip faulting. Geodinamica Acta, 14, 177-195.
• McClusky, S., Balassanian, S., Barka, A.A., Demir, C., Ergintav, S., Georgiev, I., Gürkan, O., Hamburger, M., Hurst, K., Kahle, H., Kastens, K., Kekelidze, G., King, R.W., Kotzev, V., Lenk, O., Mahmoud, S., Mıshın, A., Nadaria, M., Ouzounıs, A., Paradıssıs, D., Peter, Y., Prelepin, M., Reilinger, R.E., Şanlı, I., Seeger, H., Tealeb, A., Toksöz, M.N., & Veis, G. (2000). Global positioning system consraints on plate kinematics and dynamics in the eastern Mediterranean and Caucasus. Jour. Geophys. Res., 105, 5685-5719.
• Meghraoui, M., Gomez, F., Sbeinati, R., Van der woerd, J., Mouty, M., Darkal, A.N., Radvan, Y., Layyous, I., Al Najjar, H., Darawcheh, R., Hijadi, F., Al-Ghazzi, R., & Barazangi, M. (2003). Evidence for 830 years of seismic quiescence from paleoseismology, archaeoseismology and historical seismicity along the Dead Sea fault in Syria. Earth and Planetary Science Letters, 210, 35-52.
• Muehlberger, W.R., & Gordon, M.B. (1987). Observation on the complexity of the East Anatolian fault, Turkey. Jour. Structural Geology, 9(7), 899-903.
• Nalbant, S.S., McCluskey, J., Steacy, S., & Barka, A. (2002). Stress accumulation and increased seismic risk in eastern Turkey. Earth and Planetary Science Letters, 195, 291–298.
• Parlak, O., Yavuzoğlu, A., Bayrak, A., et al. (2023). Field observations and preliminary evaluations on the 06 February 2023 Ekinözü (Kahramanmaraş) Earthquake (Mw 7,6). MTA Yerbilimleri ve Madencilik Dergisi, 3(3), 81-98. Perinçek, D., & Çemen, İ. (1990). The structural relationship between the East Anatolian and Dead Sea fault zones in Southeastern Turkey. Tectonophysics, 172, 331-340.
• Reid, H.F. (1910). Mechanics of the earthquake, the California Earthquake of April 18, 1906. Report of the State Investigation Commission, Carnegie Institution of Washington, Washington DC.
• Reilinger, R., McClusky, S., Vernant, P., Lawrence, S., Ergintav, S., Cakmak, R., Ozener, H., Kadirov, F., Guliev, I., Stepanyan, R., Nadariya, M., Hahubia, G., Mahmoud, S., Sakr, K., ArRajehi, A., Paradissis, D., Al-Aydrus, A., Prilepin, M., Guseva, T., Evren, E., Dmitrotsa, A., Filikov, S.V., Gomez, F., Al-Ghazzi, R., & Karam, G. (2006). GPS constraints on continental deformation in the Africa-Arabia-Eurasia continental collision zone and implications for the dynamics of plate interactions. Journal of Geophysical Research-Solid Earth, 111 (B5), Art. B05411, 52.
• Softa, M. (2024). Determining the surface fault-rupture hazard zone for the Pazarcık segment of the East Anatolian fault zone through comprehensive analysis of surface rupture from the February 6, 2023, Earthquake (Mw 7.7). Journal of Mountain Science, 21(8), 2646-2663.
• Softa, M, Kocbulut, F., Akgün, E., Aksoy, E., Sözbilir, H., Tatar, O., Karabacak, V., Özkaymak, Ç., Utku, M., Özdağ, Ö.C., Çakır, R., Demir, A., & Arslan, G. (2024). Surface rupture during the 6th of February 2023 Mw 7.6 Elbistan-Ekinözü. (Kahramanmaraş) earthquake: implications for fault rupture dynamics along the northern branch of East Anatolian Fault Zone. Turkish Journal of Earth Sciences, 33(1), 1-21.
• Şaroğlu, F., Emre, Ö., & Kuşçu, İ. (1992). The East Anatolian fault zones of Turkey. Annales Tectonicae, 6, 99-125.
• Şengör, A.M.C., & Yılmaz, Y. (1981). Tethyan evolution of Turkey; a plate tectonic approach. Tectonophysics, 75(3-4), 181-241.
• Şengör, A.M.C., Görür, N., & Şaroğlu, F. (1985). Strike-slip faulting and related basin formation in zones of tectonic escape: Turkey as a case study. In Strike-slip Deformation, Basin Formation, and Sedimentation, Soc. Econ. Paleontol. Spec. Publ. Editör: Biddle, K. T., Christie-Blick, N. Oklahoma: Society of Economic Paleontologists and Mineralogists, Special Publication, pp 227- 264.
• Uzel, B., & Sözbilir, H. (2008). A frst record of a strike-slip basin in Western Anatolia and its tectonic implication: the Cumaovası Basin. Turk J Earth Sci, 17,559-59.
• Wells, D.L., & Coppersmith, K.J. (1994). New empirical relationships among magnitude, rupture length, rupture width, rupture area, and surface displacement. Bulletin of the seismological Society of America, 84(4), 974-1002.
• Westaway, R. (2003). Kinematics of the Middle East and Eastern Mediterranean Updated. Turkish J. Earth Sci., 12, 5-46.
• Westaway, R. (2006). Late Cenozoic extension in southwest Bulgaria: a synthesis. In: Robertson, A. H. F., Mountrakis, D. (Eds.), Tectonic Development of the Eastern Mediterranean Region, Geological Society, London, Special Publications, 260, 557–590.
• Yılmaz, H., Över, S., & Özden, S. (2006). Kinematics of The East Anatolian Fault Zone between Türkoğlu (Kahramanmaraş) and Çelikhan (Adıyaman), Eastern Turkey. Earth Planets Space, 58, 1463-1473.
• Yönlü, Ö. (2012). The Late Quaternary Activity of Southwestern Part of the East Anatolian Fault Zone in Turkey. [Doktora Tezi, Eskişehir Osmangazi Üniversitesi Fen Bilimleri Enstitüsü].
• Yönlü, Ö., & Karabacak, V. (2024). Surface rupture history and 18 kyr long slip rate along the Pazarcık segment of the East Anatolian Fault. Geological Society, London, 181, 1-11.
• Yüksel, Ö. (2009). Gölbaşı (Adıyaman) dolayında Doğu Anadolu Fay Sisteminin paleosismisitesi ve zeminlerin değerlendirilmesi [Yüksek Lisans Tezi, Çukurova Üniversitesi Fen Bilimleri Enstitüsü].