Investigation of site properties of the Çaldıran (Van, Eastern Turkey) settlement area using surface wave and microtremor methods

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Alkan A., Akkaya İ.

JOURNAL OF AFRICAN EARTH SCIENCES, vol.197, no.1, pp.1-10, 2023 (SCI-Expanded)

  • Publication Type: Article / Article
  • Volume: 197 Issue: 1
  • Publication Date: 2023
  • Doi Number: 10.1016/j.jafrearsci.2022.104737
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Aquatic Science & Fisheries Abstracts (ASFA), CAB Abstracts, Geobase, INSPEC
  • Page Numbers: pp.1-10
  • Van Yüzüncü Yıl University Affiliated: Yes


Çaldıran (Van, eastern side of Turkey) which is a seismically very active region has more than active faults

around and the areas under active tectonic effect. The earthquakes and soil characteristics are the significant

factors that increase the severity of the damages ratio. For this reason, the characteristics of the engineering

structure should be defined accurately and reliably. The shear wave velocity (Vs) obtained from geophysical

methods is one of the most important parameters that determine the behavior of the soil during an earthquake. In

this study, active and passive source surface wave methods were applied at different measurement points in the

study area in order to determine soil properties of the settlement area and its surroundings in Çaldıran district the

city of Van. As part of this study, 80 boreholes, 95 multichannel analysis of surface wave (MASW) profiles, and

66 microtremor (HVSR) measurements were performed in the study area. The Vs velocity with depth dependent

could be determined by using the dispersive behavior of Rayleigh waves in surface wave analysis methods. In

order to analyze the engineering characteristic of the region and earthquake-soil-structure relations parameters

such as the amplification factor, predominant period (t0), Vs velocity, average velocity up to 30 m Vs30, and

seismic vulnerability index (Kg) maps have been prepared. In order to reveal the variety of the engineering

properties of the area in horizontal and vertical directions, depth cross-sections in different directions were

created. When the tectonic structure and regional geology were examined, it was determined that all profile

results were compatible with the geological structure