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Journal of Seismology

, Volume 17, Issue 2, pp 425–435 | Cite as

Preliminary seismic microzonation of Sivas city (Turkey) using microtremor and refraction microtremor (ReMi) measurements

  • Aydın Büyüksaraç
  • Özcan Bektaş
  • Hüseyin Yılmaz
  • M. Özgü Arısoy
Original Article

Abstract

Sivas city, located in the inner east part of Anatolia (Turkey), is far from seismic sources. However, the city is under risk owing to strong earthquakes occurring around the area, and different soil conditions that can produce variation in the ground motion amplification. Microzonation of cities provides a basis for site-specific hazard analysis in urban settlements. In particular, seismic microzonation can be achieved by means of detailed seismic assessment of the area, including earthquake recordings and geological studies. In this paper, we propose a preliminary microzonation map for the city of Sivas, based on the variation in the dominant periods of the sediments covering the area. The periods are retrieved from microtremor measurements conducted at 114 sites, using the horizontal-to-vertical spectral ratio technique. The results of microtremor analysis were compared with those obtained from refraction microtremor measurements at two profiles crossing the studied area. According to the classification of dominant periods, Sivas area can be divided into four zones, probably prone to different levels of seismic hazard. However, specific studies including analysis of weak earthquakes are required in the future to validate our microzonation map.

Keywords

Sivas city Microtremor HVNSR Microzonation Refraction microtremor (ReMi) 

Notes

Acknowledgments

The authors thank to two anonymous reviewers for a comprehensive and delicate review of this paper. We also thank to Thomas Braun for the editorial handling of our paper. This research was financially supported by the State Planning Organisation (project code: DPT-2005.K.120220).

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Copyright information

© Springer Science+Business Media B.V. 2012

Authors and Affiliations

  • Aydın Büyüksaraç
    • 1
  • Özcan Bektaş
    • 2
  • Hüseyin Yılmaz
    • 2
  • M. Özgü Arısoy
    • 2
  1. 1.Geophysical Engineering DepartmentÇanakkale Onsekiz Mart UniversityÇanakkaleTurkey
  2. 2.Geophysical Engineering DepartmentCumhuriyet UniversitySivasTurkey

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