Sub-Patch Roughness in Earthquake Rupture Investigations

Handle URI:
http://hdl.handle.net/10754/596861
Title:
Sub-Patch Roughness in Earthquake Rupture Investigations
Authors:
Zielke, Olaf ( 0000-0002-4797-0034 ) ; Mai, Paul Martin ( 0000-0002-9744-4964 )
Abstract:
Fault geometric complexities exhibit fractal characteristics over a wide range of spatial scales (<µm to >km) and strongly affect the rupture process at corresponding scales. Numerical rupture simulations provide a framework to quantitatively investigate the relationship between a fault's roughness and its seismic characteristics. Fault discretization however introduces an artificial lower limit to roughness. Individual fault patches are planar and sub-patch roughness –roughness at spatial scales below fault-patch size– is not incorporated. Does negligence of sub-patch roughness measurably affect the outcome of earthquake rupture simulations? We approach this question with a numerical parameter space investigation and demonstrate that sub-patch roughness significantly modifies the slip-strain relationship –a fundamental aspect of dislocation theory. Faults with sub-patch roughness induce less strain than their planar-fault equivalents at distances beyond the length of a slipping fault. We further provide regression functions that characterize the stochastic effect sub-patch roughness.
KAUST Department:
Earth Science and Engineering Program
Citation:
Sub-Patch Roughness in Earthquake Rupture Investigations 2016:n/a Geophysical Research Letters
Publisher:
Wiley-Blackwell
Journal:
Geophysical Research Letters
Issue Date:
13-Feb-2016
DOI:
10.1002/2015GL067084
Type:
Article
ISSN:
00948276
Sponsors:
The research reported in this publication was supported by funding from King Abdullah University of Science and Technology (KAUST). No financial or other types of conflicts of interest exist for the authors regarding this manuscript. Figures in the main manuscript and supporting online material provide all data used in this investigation. We want to thank M. Galis for many stimulating discussion. We also want to thank the reviewers for their constructive criticism and helpful comments that improved this study.
Additional Links:
http://doi.wiley.com/10.1002/2015GL067084
Appears in Collections:
Articles; Earth Science and Engineering Program

Full metadata record

DC FieldValue Language
dc.contributor.authorZielke, Olafen
dc.contributor.authorMai, Paul Martinen
dc.date.accessioned2016-02-21T14:20:32Zen
dc.date.available2016-02-21T14:20:32Zen
dc.date.issued2016-02-13en
dc.identifier.citationSub-Patch Roughness in Earthquake Rupture Investigations 2016:n/a Geophysical Research Lettersen
dc.identifier.issn00948276en
dc.identifier.doi10.1002/2015GL067084en
dc.identifier.urihttp://hdl.handle.net/10754/596861en
dc.description.abstractFault geometric complexities exhibit fractal characteristics over a wide range of spatial scales (<µm to >km) and strongly affect the rupture process at corresponding scales. Numerical rupture simulations provide a framework to quantitatively investigate the relationship between a fault's roughness and its seismic characteristics. Fault discretization however introduces an artificial lower limit to roughness. Individual fault patches are planar and sub-patch roughness –roughness at spatial scales below fault-patch size– is not incorporated. Does negligence of sub-patch roughness measurably affect the outcome of earthquake rupture simulations? We approach this question with a numerical parameter space investigation and demonstrate that sub-patch roughness significantly modifies the slip-strain relationship –a fundamental aspect of dislocation theory. Faults with sub-patch roughness induce less strain than their planar-fault equivalents at distances beyond the length of a slipping fault. We further provide regression functions that characterize the stochastic effect sub-patch roughness.en
dc.description.sponsorshipThe research reported in this publication was supported by funding from King Abdullah University of Science and Technology (KAUST). No financial or other types of conflicts of interest exist for the authors regarding this manuscript. Figures in the main manuscript and supporting online material provide all data used in this investigation. We want to thank M. Galis for many stimulating discussion. We also want to thank the reviewers for their constructive criticism and helpful comments that improved this study.en
dc.language.isoenen
dc.publisherWiley-Blackwellen
dc.relation.urlhttp://doi.wiley.com/10.1002/2015GL067084en
dc.rightsThis is the peer reviewed version of the following article: Zielke, O., and P. M. Mai (2016), Sub-Patch Roughness in Earthquake Rupture Investigations. Geophys. Res. Lett., 42, which has been published in final form at http://doi.wiley.com/10.1002/2015GL067084. This article may be used for non-commercial purposes in accordance With Wiley Terms and Conditions for self-archiving.en
dc.titleSub-Patch Roughness in Earthquake Rupture Investigationsen
dc.typeArticleen
dc.contributor.departmentEarth Science and Engineering Programen
dc.identifier.journalGeophysical Research Lettersen
dc.eprint.versionPost-printen
dc.contributor.affiliationKing Abdullah University of Science and Technology (KAUST)en
kaust.authorZielke, Olafen
kaust.authorMai, Paul Martinen
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