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

Authors :
Yaghmaei-Sabegh, Saman
Source :
Natural Hazards; Mar2020, Vol. 101 Issue 2, p349-365, 17p
Publication Year :
2020

Abstract

This study aims at providing the spatial contours of frequency-content parameters of ground motion records obtained during the 2017 M<subscript>w</subscript> 7.3 Ezgeleh–Kermanshah earthquake in Iran. For this purpose, three scalar frequency-content parameters named the mean period (T m) , the average spectral period (T ave) , and the smoothed spectral predominant period (T 0) 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. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
0921030X
Volume :
101
Issue :
2
Database :
Complementary Index
Journal :
Natural Hazards
Publication Type :
Academic Journal
Accession number :
142384267
Full Text :
https://doi.org/10.1007/s11069-020-03876-2