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An updated corner-frequency model for stochastic finite-fault ground-motion simulation

Tang Yuxiang
An updated corner-frequency model for stochastic finite-fault ground-motion simulation
Bulletin of the Seismological Society of America (January 2022) 112 (2): 921-938

Abstract

Stochastic finite-fault ground-motion simulation is widely used in various scientific and engineering applications. However, the current theoretical modeling of the corner frequency used in the source spectrum model is problematic as it does not consider the impact of rupture velocity. This article provides a modification of the current corner-frequency modeling and establishes a correlation between corner frequency and rupture velocity, making the source spectrum model more theoretically consistent. An additional inspection of the source-duration model is provided, and the appropriateness of the application of the widely used 1/f (sub 0) source-duration model is discussed. A detailed comparison between the updated corner-frequency model and the currently used model (embodied in EXSIM) is provided for various magnitudes. For validation purposes, the updated corner-frequency and source-duration model is applied to predict the ground motions on rock sites during the 2012 ML 5.4 Moe earthquake that occurred in southeastern Australia and the 2014 Ms 6.5 Ludian earthquake that occurred in southwestern China. The results show that the updated model is reliable for providing more accurate estimates of corner frequency, source duration, and ground-motion amplitudes with smaller average residuals than the currently used model.


ISSN: 0037-1106
EISSN: 1943-3573
Coden: BSSAAP
Serial Title: Bulletin of the Seismological Society of America
Serial Volume: 112
Serial Issue: 2
Title: An updated corner-frequency model for stochastic finite-fault ground-motion simulation
Author(s): Tang Yuxiang
Affiliation: Guangzhou University, School of Civil Engineering, Guangzhou, China
Pages: 921-938
Published: 20220118
Text Language: English
Publisher: Seismological Society of America, Berkeley, CA, United States
References: 70
Accession Number: 2022-011439
Categories: Seismology
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. 6 tables, sketch maps
N26°00'00" - N34°10'00", E97°30'00" - E108°25'00"
S39°00'00" - S34°00'00", E140°00'00" - E150°00'00"
N21°40'00" - N29°00'00", E97°30'00" - E106°10'00"
N24°40'00" - N29°19'60", E103°00'00" - E109°30'00"
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2022, American Geosciences Institute. Abstract, Copyright, Seismological Society of America. Reference includes data from GeoScienceWorld, Alexandria, VA, United States
Update Code: 202210
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