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A numeric evaluation of attenuation from ambient noise correlation functions

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dc.creatorLawrence, Jesse F.spa
dc.creatorDenolle, Marinespa
dc.creatorSeats, Kevin J.spa
dc.creatorPrieto Gomez, German Andresspa
dc.date.accessioned2020-08-06T16:20:20Z
dc.date.available2020-08-06T16:20:20Z
dc.date.created2013spa
dc.description.abstractThe ambient noise correlation function (NCF) calculated between seismic stations contains, under appropriate conditions, accurate travel time information. However, NCF amplitudes are highly debated due to noise source intensity and distribution, seismic intrinsic attenuation, scattering, and elastic path effects such as focusing and defocusing. We prove with various numerical simulations that the NCFs calculated for a uniformly dispersive medium using the coherency method preserve accurate geometrical spreading and attenuation decay. We show that for a wide range of noise source distributions, the coherency of the noise correlation functions matches a Bessel function decaying exponentially with a specific attenuation coefficient. Conditions needed to obtain these results include averaging over long enough time intervals, a uniformly distributed seismic network, and a good distribution of far?field noise sources. We also show that the estimated attenuation coefficient corresponds to the interstation and not the noise?source?to?receiver structure.eng
dc.format.mimetypeapplication/pdf
dc.identifier.doihttps://doi.org/10.1002/2012JB009513
dc.identifier.issnISSN: 2169-9356
dc.identifier.urihttps://repository.urosario.edu.co/handle/10336/25964
dc.language.isoengspa
dc.publisherAmerican Geophysical Unionspa
dc.relation.citationEndPage6145
dc.relation.citationStartPage6134
dc.relation.citationTitleJournal of Geophysical Research: Solid Earth
dc.relation.citationVolumeVol. 118
dc.relation.ispartofJournal of Geophysical Research: Solid Earth, Vol.118 (2013) pp.6134–6145spa
dc.relation.urihttps://agupubs.onlinelibrary.wiley.com/doi/epdf/10.1002/2012JB009513spa
dc.rights.accesRightsinfo:eu-repo/semantics/openAccess
dc.rights.accesoAbierto (Texto Completo)spa
dc.sourceJournal of Geophysical Research: Solid Earthspa
dc.source.instnameinstname:Universidad del Rosario
dc.source.reponamereponame:Repositorio Institucional EdocUR
dc.subject.keywordNoise numericalspa
dc.subject.keywordCorrelationsspa
dc.subject.keywordFunctionsspa
dc.titleA numeric evaluation of attenuation from ambient noise correlation functionsspa
dc.title.TranslatedTitleUna evaluación numérica de la atenuación de las funciones de correlación de ruido ambiental.spa
dc.typearticleeng
dc.type.hasVersioninfo:eu-repo/semantics/publishedVersion
dc.type.spaArtículospa
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