A Comparative Study on Ground Motion Attenuation in the 2012 Varzaghan-Ahar Doublet Event,Northwest of Iran |
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Authors: | Saman Yaghmaei-Sabegh Abdolreza Ghods |
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Affiliation: | 1. Department of Civil Engineering, University of Tabriz, Tabriz, Irans_yaghmaei@tabrizu.ac.ir;3. Department of Earth Sciences, Institute for Advanced Studies in Basic Sciences, Zanjan, Iran |
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Abstract: | Predictive capabilities of the four updated NGA ground-motion models (NGA-WEST2) are evaluated in this study for acceleration response spectra using observed ground motions for August 11, 2012 Varzaghan-Ahar events in Iran. The predicted results were compared with those of regional attenuation equations and NGA08 models as well. The results of analyses revealed that the models of NGA-WEST2 improve prediction performance of NGA08 models for the two studied moderate events. All of models underestimate the recorded spectra of the second event for regionally significant period of 0.2 s at source distances below 50 km. For this distance range, almost all of the models underestimate the recorded spectra for periods larger than 1 s. |
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Keywords: | Earthquake Ground Motion Attenuation Relationship GMPE NGA Models Doublet Earthquake Iran |
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