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Influence of super-shear earthquake rupture models on simulated near-source ground motion from the 1999 Izmit, Turkey, earthquake

Hideo Aochi, Virginie Durand and John Douglas
Influence of super-shear earthquake rupture models on simulated near-source ground motion from the 1999 Izmit, Turkey, earthquake
Bulletin of the Seismological Society of America (April 2011) 101 (2): 726-741

Abstract

We numerically simulate seismic wave propagation from the 1999 M (sub w) 7.4 earthquake in Izmit, Turkey, using a 3D finite difference method based on published finite-source models obtained by waveform inversions. This earthquake has been reported, based on observations at the near-fault station SKR, as an example of supershear rupture propagation toward the east. Although the modeled ground motion does show a characteristic Mach wave from the fault plane, it is difficult to identify any particular effects in terms of peak ground velocity (PGV), an important parameter in earthquake engineering. This is because the fault's spatial heterogeneity is strong enough to mask the properties of supershear rupture, which has been reported through several numerical simulations mostly based on homogeneous fault conditions. This article demonstrates the importance of studying ground motions for known earthquakes through numerical simulations based on finite-fault source models.


ISSN: 0037-1106
EISSN: 1943-3573
Serial Title: Bulletin of the Seismological Society of America
Serial Volume: 101
Serial Issue: 2
Title: Influence of super-shear earthquake rupture models on simulated near-source ground motion from the 1999 Izmit, Turkey, earthquake
Affiliation: BRGM, Natural Risks and CO2 Storage Safety Division, Orleans, France
Pages: 726-741
Published: 201104
Text Language: English
Publisher: Seismological Society of America, Berkeley, CA, United States
References: 67
Accession Number: 2011-056679
Categories: Seismology
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. 2 tables
N35°49'60" - N42°00'00", E26°00'00" - E44°45'00"
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Abstract, Copyright, Seismological Society of America. Reference includes data from GeoScienceWorld, Alexandria, VA, United States
Update Code: 201132
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