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Frequency-content parameters of the ground motions from the 2017 Mw 7.3 Ezgeleh earthquake in Iran

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  • Saman Yaghmaei-Sabegh

    (University of Tabriz)

Abstract

This study aims at providing the spatial contours of frequency-content parameters of ground motion records obtained during the 2017 Mw 7.3 Ezgeleh–Kermanshah earthquake in Iran. For this purpose, three scalar frequency-content parameters named the mean period $$ (T_{\text{m}} ) $$(Tm), the average spectral period $$ (T_{\text{ave}} ) $$(Tave), and the smoothed spectral predominant period $$ (T_{0} ) $$(T0) are calculated. Sixty earthquake records with the closest site-to-source distances in the range of 5–330 km were used to make several high-resolution frequency-content maps for the study area. In addition, a new practical framework is presented to estimate soil condition maps based on a simplified ground motion records analyzing which could be used in rapid loss evaluation after earthquakes. As a new idea, the main features of the horizontal-to-vertical spectral ratio curves including amplification amplitude and peak frequency that can identify resonance effect are automatically considered in the proposed regional soil class map. The consistency between frequency-content maps with the anticipated soil condition map is discussed. Prepared maps showed that very long period range extends in the northwest–southeast direction, far from the epicenter.

Suggested Citation

  • Saman Yaghmaei-Sabegh, 2020. "Frequency-content parameters of the ground motions from the 2017 Mw 7.3 Ezgeleh earthquake in Iran," 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. 101(2), pages 349-365, March.
    • Handle: RePEc:spr:nathaz:v:101:y:2020:i:2:d:10.1007_s11069-020-03876-2
    DOI: 10.1007/s11069-020-03876-2
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    References listed on IDEAS

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    1. Saman Yaghmaei-Sabegh & Hing-Ho Tsang, 2014. "Site class mapping based on earthquake ground motion data recorded by regional seismographic network," 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. 73(3), pages 2067-2087, September.
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