General seismic zonation in terms of high-frequency incoherent radiation: Theoretical and practical aspects
Far East Geological Institute, Far Eastern Branch of Russian Academy of Sciences
Journal: Problems of Engineering Seismology
Tome: 51
Number: 2
Year: 2024
Pages: 20–35
UDK: 550.34
DOI: 10.21455/VIS2024.2-2
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Konovalov A.V. General seismic zonation in terms of high-frequency incoherent radiation: Theoretical and practical aspects // . 2024. Т. 51. № 2. С. 20–35. DOI: 10.21455/VIS2024.2-2
@article{KonovalovGeneral2024,
author = "Konovalov, A. V.",
title = "General seismic zonation in terms of high-frequency incoherent radiation: Theoretical and practical aspects",
journal = "Problems of Engineering Seismology",
year = 2024,
volume = "51",
number = "2",
pages = "20–35",
doi = "10.21455/VIS2024.2-2",
language = "English"
}
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Keywords: general seismic zonation, strong ground motion, simulation, asperity
Аnnotation: An improvement to the methodology of general seismic zoning is proposed. As a basic ground motion parameter (in physical units), a high-frequency metrics is considered. The proposed metrics reproduces the properties of incoherence, as well as an adequate transition to engineering characteristics. Regionalization of the attenuation model is based on its physical representation within the framework of a source model with fragmentary asperities, which are sub-sources of high-frequency incoherent radiation. To parameterize ground shaking level, the stress parameter, determined from high-frequency spectra, is used. The average stress drop on asperities for subduction earthquakes was about 40 MPa, for crustal earthquakes it is ranging from 10 to 40 MPa. The paper presents a brief overview, search and justification of physical parameters of the earthquake source, as well as proposed and tested calculation procedures for stochastic simulation of high-frequency ground shaking level with amplitudes and spectra expected from observations.