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Ground motion prediction equations based on shallow crustal earthquakes in Georgia and the surrounding Caucasus

Earthquake Science 2022年第6期35卷 497-509页

作者： Jorjiashvili Nato shengelia ia Godoladze Tea Gunia Irakli Akubardia Dimitri Institute of Earth Sciences and National Seismic Monitoring Center Ilia State UniversityTbilisi 0177Georgia

Strong ground motions caused by earthquakes with magnitudes ranging from 3.5 to 6.9 and hypocentral distances of up to 300km were recorded by local broadband stations and three-component accelerograms within Georgia’s enhanced digital seismic *** data mixing is particularly effective in areas where strong ground motion data are *** data were used to produce models based on ground-motion prediction equations(GMPEs),one benefit of which is that they take into consideration information from waveforms across a wide range of *** this study,models were developed to predict ground motions for peak ground acceleration and 5%-damped pseudo-absolute-acceleration spectra for periods between 0.01 and 10 ***-period ground motions decayed faster than long-period motions,though decay was still in the order of approximately 1/*** mechanisms and local soil conditions greatly influence *** spectral acceleration(SA)of thrust faults was higher than that for either strike-slip or normal faults but the influence of strike-slip faulting on SA was slightly greater than that for normal *** soils also caused significantly more amplification than rocky sites.

关键词： strong ground motion peak ground acceleration spectral acceleration shallow earthquake

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