Possible 3D Dynamic Rupture Models for the Mw7.8 Kahramanmaraş Earthquake


Korkusuz Öztürk Y., Meral Özel N., Konca A. Ö.

Sunum, ss.1, 2023

  • Yayın Türü: Diğer Yayınlar / Sunum
  • Basım Tarihi: 2023
  • Sayfa Sayıları: ss.1
  • Erzincan Binali Yıldırım Üniversitesi Adresli: Evet

Özet

The Mw7.8 Kahramanmaras earthquake occurred on 6th of February 2023 initiated on a splay fault called Narli and proceeded along the EAF (East Anatolian Fault) bilaterally, rupturing a total of more than 300 km. The earthquake ruptured a long seismic gap of the EAF and the Amanos Fault which connects to the Cyprus Arc offshore. Initial research models present that the rupture propagated faster toward northeast and slower toward southwest. This can be the result of that the rupture along the NNE of the EAF was dynamically triggered by the splay fault that behaves as a continuum of the EAF, while SSW extension of the EAF was statically triggered. This raises the question of how the slip distribution and rupture parameters were affected by the rupture initiation at a splay fault. Surface rupture of the earthquake is also quite heterogeneous. In addition, initial kinematic modeling studies reveal that rupture velocity was also highly variable. All these factors indicate that the investigation of the dynamic propagation of the earthquake rupture along the EAF and the stress conditions which explain the rupture propagation patterns for recent earthquakes are essential. In this study, we generate dynamic rupture simulations of Mw7.8 Kahramanmaras earthquake based on coseismic slip distributions from kinematic source inversions using the Finite Element code PyLith. Therefore, we aim to understand super-shear and sub-shear rupture velocity behavior of the EAF and dynamics of the Kahramanmaras earthquakes and stress transfer to neighboring faults which are significant in order to comprehend the potential of possible destructive earthquakes in the East Anatolian region, and generation of damage, shaking and PGA distribution scenarios.