ESTIMATION OF THE QUALITY FACTOR AND SOURCE PARAMETERS OF WEST OF IRAN FROM ACCELERATION SPECTRA OF THE TAZEHABADKERMANSHAH EARTHQUAKE 2018
Publish Year: 1398
نوع سند: مقاله کنفرانسی
زبان: English
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SEE08_008
تاریخ نمایه سازی: 27 خرداد 1399
Abstract:
Strong earthquakes occurred on the 26th of August 2018 (MW 5.9) in the Kermanshah Province, West of Iran.High-frequency strong-motion data of this earthquake has been analyzed to determine the source parameters and Qβ(f) by inversion of the recorded data. We have used the data from a local network of 26 acceleration records for the main shocks to estimate Q-relationship in 26 stations. The seismic hazard map for this region illustrates that most of the area in this province is located within high relative risk and characterized by a large number of heterogeneities. For frequency band of 1 to 20 HZ, the frequency-dependent attenuation for this region found to be Qβ(f)=(101±19)f (0.76±0.05). The authenticity of achieved Qβ(f) relation is checked by comparing the source spectra in various stations with the theoretical spectra. Low values of the coefficient (Q < 200) in the Qβ(f) relation suggest that the region is seismically and tectonically active.
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Authors
Saman Amiri
PhD Candidate, International Institute of Earthquake Engineering and Seismology, Tehran, Iran
Majid Mahood
Assistant Professor, International Institute of Earthquake Engineering and Seismology, Tehran, Iran