An initial velocity model based on VS30 for the region affected by the February 6, 2023 Turkiye earthquakes

İLHAN O., MURATOĞLU TEMİZ G., ASKAN GÜNDOĞAN A., Taciroğlu E.

Bulletin of Earthquake Engineering, vol.23, no.9, pp.3569-3587, 2025 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 23 Issue: 9
  • Publication Date: 2025
  • Doi Number: 10.1007/s10518-025-02188-9
  • Journal Name: Bulletin of Earthquake Engineering
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, PASCAL, Agricultural & Environmental Science Database, Aquatic Science & Fisheries Abstracts (ASFA), Compendex, Geobase, INSPEC, Civil Engineering Abstracts
  • Page Numbers: pp.3569-3587
  • Keywords: 2023 Turkiye earthquakes, February 6, Ground motion simulations, Velocity model
  • Middle East Technical University Affiliated: Yes

Abstract

This paper presents a VS30-dependent one-dimensional (1D) velocity model for the region affected by the February 6, 2023, earthquakes in Turkiye, which were marked by complex fault interactions along the East Anatolian Fault Zone. The proposed model utilizes VS measurements from 118 strong ground motion stations to develop a shallow VS structure (≤ 0.1 km), integrates deeper VS data from Acarel et al. (2019), and establishes a VS transition zone for intermediate depths (0.1 km to 0.6 km). The model evaluation indicated minimal bias despite some discrepancies. Additionally, compressional wave velocities (VP) and densities (ρ) corresponding to the VS30-conditioned VS model are provided. The findings from this study can be applied in a range of disciplines, including geotechnical and structural engineering, as well as ground motion simulations.