Preliminary estimates of regional characteristics of radiation and propagation of seismic waves and ground motion prediction equations for the Ural region
Schmidt Institute of Physics of the Earth, Russian Academy of Sciences
Journal: Problems of Engineering Seismology
Tome: 49
Number: 2
Year: 2022
Pages: 74-84
UDK: 550.347
DOI: 10.21455/VIS2022.2-4
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Pavlenko V.A. Preliminary estimates of regional characteristics of radiation and propagation of seismic waves and ground motion prediction equations for the Ural region // . 2022. Т. 49. № 2. С. 74-84. DOI: 10.21455/VIS2022.2-4
@article{PavlenkoPreliminary2022,
author = "Pavlenko, V. A.",
title = "Preliminary estimates of regional characteristics of radiation and propagation of seismic waves and ground motion prediction equations for the Ural region",
journal = "Problems of Engineering Seismology",
year = 2022,
volume = "49",
number = "2",
pages = "74-84",
doi = "10.21455/VIS2022.2-4",
language = "English"
}
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Keywords: characteristics of radiation and propagation of seismic waves, stochastic simulation, ground motion prediction equations, seismic hazard analysis
Аnnotation: In this work, the first estimates of the characteristics of radiation and propagation of seismic waves in the Ural region are obtained by modeling the accelerograms of registered local earthquakes. The obtained source characteristics are similar to those of the Caucasian region, and the characteristics of the propagation of seismic waves are similar to the characteristics of the Baikal rift zone. The slightly increased duration of strong motion in the Ural region can obviously be explained by the fractured structure of the Ural Mountains. The ground motion prediction equations (GMPEs) proposed by the Global Earthquake Model (GEM) project for the Ural region correspond to platform regions with stable continental seismicity, while the obtained characteristics of radiation and propagation of seismic waves in the Ural region correspond to seismically active regions with crustal seismicity. Comparison of the amplitudes of the response spectrum of the strongest earthquake recorded in the region with the estimates obtained on the basis of the GMPEs shows a significant excess of the estimates over the observed spectral amplitudes. Thus, the recommendations of the GEM project, obviously, cannot be used in their original form, without correction factors, which emphasizes the necessity of developing the regional GMPEs for the purposes of seismic hazard analysis.