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dc.creatorSeats, Kevin J. 
dc.creatorLawrence, Jesse F. 
dc.creatorPrieto, German A. 
dc.date.accessioned2020-08-19T14:44:16Z
dc.date.available2020-08-19T14:44:16Z
dc.date.created2011-11-17
dc.identifier.issnISSN: 0956-540X
dc.identifier.issnEISSN: 1365-246X
dc.identifier.urihttps://repository.urosario.edu.co/handle/10336/27856
dc.description.abstractHere, we evaluate the improvement in noise correlation functions (NCFs) gained by dividing ambient seismic records into shorter, overlapping time windows before correlation and stacking (Welch's method). We compare waveform convergence of short duration NCF stacks (e.g. 2, 5, 15 and 50 d stacks) towards the long?term (365 d) NCF stack. We observe short duration NCF improvement when applying Welch's method for non–pre?processed and running normalized time?series and short duration NCF degradation when applied to a ‘one?bit’ normalized time?series. Surprisingly, non–pre?processed time?series provides the quickest convergence to a robust (year?long) NCF. Because of the simplicity of Welch's method, the improved NCF convergence and a minimal increase in computation, we recommend applying Welch's method for future ambient seismic field analyses. Using this approach will likely improve future NCF analyses, particularly for studies with limited duration recordings, high levels of intermittent local or site noise and studies attempting to evaluate temporal variations in subsurface structure.
dc.format.mimetypeapplication/pdf
dc.language.isoeng
dc.relation.ispartofGeophysical Journal International, ISSN: 0956-540X;EISSN: 1365-246X, Vol.188, No.2 (February 2012); pp. 513-523
dc.relation.urihttps://onlinelibrary.wiley.com/doi/epdf/10.1111/j.1365-246X.2011.05263.x
dc.sourceGeophysical Journal International
dc.titleImproved ambient noise correlation functions using Welch's method
dc.typearticle
dc.publisherJohn Wiley & Sons
dc.subject.keywordTime?series analysis
dc.subject.keywordInterferometry
dc.subject.keywordSurface waves and free oscillations
dc.subject.keywordSeismic tomography
dc.rights.accesRightsinfo:eu-repo/semantics/restrictedAccess
dc.type.spaArtículo
dc.rights.accesoRestringido (Acceso a grupos específicos)
dc.type.hasVersioninfo:eu-repo/semantics/publishedVersion
dc.identifier.doihttps://doi.org/10.1111/j.1365-246X.2011.05263.x
dc.title.TranslatedTitleFunciones de correlación de ruido ambiental mejoradas mediante el método de Welch
dc.relation.citationEndPage523
dc.relation.citationIssueNo. 2
dc.relation.citationStartPage513
dc.relation.citationTitleGeophysical Journal International
dc.relation.citationVolumeVol. 188


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