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Quantifying seismic source parameter uncertainties

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dc.creatorKane, Deborah L.spa
dc.creatorPrieto, German A.spa
dc.creatorVernon, Frank L.spa
dc.creatorShearer, Peter M.spa
dc.date.accessioned2020-08-19T14:40:20Z
dc.date.available2020-08-19T14:40:20Z
dc.date.created2011-04-01spa
dc.description.abstractWe use data from a small aperture array in southern California to quantify variations in source parameter estimates at closely spaced stations (distances ranging from ?7 to 350 m) to provide constraints on parameter uncertainties. Many studies do not consider uncertainties in these estimates even though they can be significant and have important implications for studies of earthquake source physics. Here, we estimate seismic source parameters in the frequency domain using empirical Green’s function (EGF) methods to remove effects of the travel paths between earthquakes and their recording stations. We examine uncertainties in our estimates by quantifying the resulting distributions over all stations in the array. For coseismic stress drop estimates, we find that minimum uncertainties of ?30% of the estimate can be expected. To test the robustness of our results, we explore variations of the dataset using different groupings of stations, different source regions, and different EGF earthquakes. Although these differences affect our absolute estimates of stress drop, they do not greatly influence the spread in our resulting estimates. These sensitivity tests show that station selection is not the primary contribution to the uncertainties in our parameter estimates for single stations. We conclude that establishing reliable methods of estimating uncertainties in source parameter estimates (including corner frequencies, source durations, and coseismic static stress drops) is essential, particularly when the results are used in the comparisons among different studies over a range of earthquake magnitudes and locations.eng
dc.format.mimetypeapplication/pdf
dc.identifier.doihttps://doi.org/10.1785/0120100166
dc.identifier.issnISSN: 0037-1106
dc.identifier.issnEISSN: 1943-3573
dc.identifier.urihttps://repository.urosario.edu.co/handle/10336/26831
dc.language.isoengspa
dc.publisherSeismological Society of Americaspa
dc.relation.citationEndPage543
dc.relation.citationIssueNo. 2
dc.relation.citationStartPage535
dc.relation.citationTitleBulletin of the Seismological Society of America
dc.relation.citationVolumeVol. 101
dc.relation.ispartofBulletin of the Seismological Society of America, ISSN: 0037-1106;EISSN: 1943-3573, Vol.101, No.2 (April 2011); pp. 535-543spa
dc.relation.urihttps://pubs.geoscienceworld.org/ssa/bssa/article-abstract/101/2/535/349427/Quantifying-Seismic-Source-Parameter?redirectedFrom=PDFspa
dc.rights.accesRightsinfo:eu-repo/semantics/restrictedAccess
dc.rights.accesoRestringido (Acceso a grupos específicos)spa
dc.sourceBulletin of the Seismological Society of Americaspa
dc.source.instnameinstname:Universidad del Rosario
dc.source.reponamereponame:Repositorio Institucional EdocUR
dc.subject.keywordAlgorithmsspa
dc.subject.keywordBody wavesspa
dc.subject.keywordCaliforniaspa
dc.subject.keywordEarthquakesspa
dc.subject.keywordElastic wavesspa
dc.subject.keywordFault zonesspa
dc.subject.keywordFaultsspa
dc.subject.keywordGreen functionspa
dc.subject.keywordMagnitudespa
dc.subject.keywordP-wavesspa
dc.subject.keywordSan Jacintospa
dc.titleQuantifying seismic source parameter uncertaintiesspa
dc.title.TranslatedTitleCuantificar las incertidumbres de los parámetros de la fuente sísmicaspa
dc.typearticleeng
dc.type.hasVersioninfo:eu-repo/semantics/publishedVersion
dc.type.spaArtículospa
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