EGU General Assembly 2023
© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.

Active Tectonics of the East Anatolian Fault Zone based on morphometric analysis on the Şiro Valley (East Anatolia)

Elif Akgün1, Savaş Topal2, Mustafa Softa3,4, Hasan Sözbilir3,4, Ercan Aksoy1, and Mehmet Yüksel5
Elif Akgün et al.
  • 1Fırat University, Faculty of Engineering , Geology Engineering, Elazığ, Türkiye ( (
  • 2Pamukkale University, Faculty of Engineering , Geology Engineering, Denizli, Türkiye (
  • 3Dokuz Eylül University, Faculty of Engineering , Geology Engineering, İzmir, Türkiye ( (
  • 4Dokuz Eylül University, Earthquake Research and Implementation Center, İzmir, Türkiye ( (
  • 5Çukurova University, Faculty of Science and Letters, Physics, Adana, Türkiye (

Eastern Mediterranean is being deformed by major intraplate strike-slip fault systems such as North Anatolian Fault Zone (NAFZ) and East Anatolian Fault Zone (EAFZ) due to the convergence between the Arabian Plate and the Eastern Anatolian Plateau. Even though the studies regarding the paleoseismology and tectonic evolution of the EAFZ have been studied since 20th century, the recent earthquakes that occurred on EAFZ (January 24, 2020-Mw:6.8) have drawn attention to the deformation dispersed into Pütürge, Sivrice and nearby segments of it.

The normalized steepness index (ksn), Chi (χ), and knickpoints (KP) are powerful geomorphological tools for determining the uplift rate and stress distribution at the convergence zones. To unravel the deformation pattern, ksn, χ, and KP analyses were performed along the longitudinal course of rivers on northern margin of the Şiro valley that is bounded by strike-slip faults with significant vertical components from its northern and southern sides.

The preliminary morphometric analysis revealed that: (i) the occurrence of knickpoints coincides with known and/mostly undefined faults affecting the elevated fluvial terraces on the main valley, (ii) the calculated ksn values increase towards the inner part of the valley.

Ultimately, these calculated morphometric indices not only will provide many benefits for determining the target sites for the geochronological studies on the uplifted river terraces in the valley, but they will also contribute to defining new secondary active faults linked with principal displacement zone and evaluation of uplift rate, erosion rate, and slip rate. This study is supported by the Scientific and Technological Research Council of Turkey (TÜBİTAK; Project No:122Y266).

Keywords: East Anatolian Fault Zone, Pütürge segment, morphometric analysis, deformation pattern, fluvial terraces

How to cite: Akgün, E., Topal, S., Softa, M., Sözbilir, H., Aksoy, E., and Yüksel, M.: Active Tectonics of the East Anatolian Fault Zone based on morphometric analysis on the Şiro Valley (East Anatolia), EGU General Assembly 2023, Vienna, Austria, 24–28 Apr 2023, EGU23-8886,, 2023.

Supplementary materials

Supplementary material file