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dc.contributor.authorCopley, AC
dc.contributor.authorReynolds, K
dc.date.accessioned2018-02-28T12:13:10Z
dc.date.available2018-02-28T12:13:10Z
dc.date.issued2018-04-01
dc.identifier.issn0956-540X
dc.identifier.urihttps://www.repository.cam.ac.uk/handle/1810/273609
dc.description.abstractWe present a seismological technique for determining the down-dip shape of seismogenic normal faults. Synthetic models of non-planar source geometries reveal the important signals in teleseismic P and SH waveforms that are diagnostic of down-dip curvature. In particular, along-strike SH waveforms are the most sensitive to variations in source geometry, and have significantly more complex and larger-amplitude waveforms for curved source geometries than planar ones. We present the results of our forward-modelling technique for 13 earthquakes. Most continental normal-faulting earthquakes that rupture through the full seismogenic layer are planar and have dips of 30°–60°. There is evidence for faults with a listric shape from some of the earthquakes occurring in two regions; Tibet and East Africa. These ruptures occurred on antithetic faults, or minor faults within the hanging walls of the rifts affected, which may suggest a reason for the down-dip curvature. For these earthquakes, the change in dip across the seismogenic part of the fault plane is ≤30°.
dc.description.sponsorshipThis work forms part of the NERC- and ESRC-funded project ‘Earthquakes without Frontiers’ and was partially supported by the NERC large grant ‘Looking inside the Continents from Space’.
dc.languageeng
dc.publisherGeological Society by Blackwell Scientific
dc.subjectbody waves
dc.subjectearthquake source observations
dc.subjectdynamics and mechanics of faulting
dc.titleSeismological constraints on the down-dip shape of normal faults
dc.typeArticle
prism.issueIdentifier1
prism.publicationDate2018
prism.publicationNameGeophysical Journal International
prism.volume213
dc.identifier.doi10.17863/CAM.20681
dcterms.dateAccepted2017-11-08
rioxxterms.versionofrecord10.1093/gji/ggx432
rioxxterms.versionVoR
rioxxterms.licenseref.urihttp://www.rioxx.net/licenses/all-rights-reserved
rioxxterms.licenseref.startdate2018-04-01
dc.contributor.orcidCopley, Alexander [0000-0003-0362-0494]
dc.identifier.eissn1365-246X
rioxxterms.typeJournal Article/Review
pubs.funder-project-idNERC (via University of Leeds) (RGEVEA100399)
pubs.funder-project-idNatural Environment Research Council (NE/K011014/1)
cam.issuedOnline2017-11-09
cam.orpheus.successThu Jan 30 13:04:25 GMT 2020 - The item has an open VoR version.
rioxxterms.freetoread.startdate2100-01-01


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