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Geotechnical and geophysical investigations on local site effects in Erzurum, Türkiye

Author

Listed:
  • Ömer Lütfü Aydin

    (Erzurum Technical University)

  • Babak Karimi

    (Erzurum Technical University)

  • İlker Kazaz

    (Erzurum Technical University)

Abstract

This study presents the geotechnical and geophysical properties of different historical and modern settlement areas in the City of Erzurum, Türkiye, with an emphasis on assessing local site effects based on microtremor measurements. Erzurum City is located near the north and east Anatolian fault zones, making it a seismically active region. As a result, Erzurum is highly vulnerable to earthquakes. To study these risks, data was collected using the Horizontal-to-Vertical Spectral Ratio (HVSR) technique from four different sites of Kahramanlar (Karaz), Kombina, Kale, and Palandöken Toki at the Erzurum Basin. The research highlights variations in soil properties such as dominant ground frequency and period, shear wave velocity (Vs30), and the vulnerability index (Kg). Results provide valuable insights into site amplification and the potential seismic hazard in the region. Areas with lower dominant frequencies, indicating deeper sediment layers, are more prone to seismic amplification and greater risk. In contrast, regions closer to mountainous areas, with higher dominant frequencies, show reduced vulnerability. These results are crucial for understanding seismic behavior and will play a key role in guiding the development of earthquake-resistant infrastructure in Erzurum.

Suggested Citation

  • Ömer Lütfü Aydin & Babak Karimi & İlker Kazaz, 2025. "Geotechnical and geophysical investigations on local site effects in Erzurum, Türkiye," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 121(11), pages 12837-12861, June.
    • Handle: RePEc:spr:nathaz:v:121:y:2025:i:11:d:10.1007_s11069-025-07298-w
    DOI: 10.1007/s11069-025-07298-w
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    References listed on IDEAS

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    1. Kenan Akbayram & Erdem Bayrak & Eren Pamuk & Çağlar Özer & Kemal Kıranşan & Sadık Varolgüneş, 2022. "Dynamic sub-surface characteristic and the active faults of the Genç District locating over the Bingöl Seismic Gap of the East Anatolian Fault Zone, Eastern Turkey," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 114(1), pages 825-847, October.
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    1. Matteo Fiorucci & Salvatore Martino & Benedetta Antonielli & Vasiliki Betty Charalampopoulou & Paolo Ciampi & Yawar Hussain & Roberto Iannucci & Daniele Inciocchi & Vassilis Karastathis & Charilaos Ma, 2025. "Local seismic response in the historical centre of Nafplio (Greece) as a tool for seismic risk management," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 121(13), pages 15581-15611, July.

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