An 8 month slow slip event triggers progressive nucleation of the 2014 Chile megathrust

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dc.contributor.authorSocquet, Anne
dc.contributor.authorPiña Valdes, Jesús
dc.contributor.authorJara, Jorge
dc.contributor.authorCotton, Fabrice
dc.contributor.authorWalpersdorf, Andrea
dc.contributor.authorCotte, Nathalie
dc.contributor.authorSpecht, Sebastian
dc.contributor.authorOrtega‐Culaciati, Francisco
dc.contributor.authorCarrizo, Daniel
dc.contributor.authorNorabuena Ortiz, Edmundo
dc.coverage.spatialChile
dc.date.accessioned2018-08-03T16:40:07Z
dc.date.available2018-08-03T16:40:07Z
dc.date.issued2017-05-16
dc.description.abstractThe mechanisms leading to large earthquakes are poorly understood and documented. Here we characterize the long‐term precursory phase of the 1 April 2014 Mw8.1 North Chile megathrust. We show that a group of coastal GPS stations accelerated westward 8 months before the main shock, corresponding to a Mw6.5 slow slip event on the subduction interface, 80% of which was aseismic. Concurrent interface foreshocks underwent a diminution of their radiation at high frequency, as shown by the temporal evolution of Fourier spectra and residuals with respect to ground motions predicted by recent subduction models. Such ground motions change suggests that in response to the slow sliding of the subduction interface, seismic ruptures are progressively becoming smoother and/or slower. The gradual propagation of seismic ruptures beyond seismic asperities into surrounding metastable areas could explain these observations and might be the precursory mechanism eventually leading to the main shock.es_ES
dc.description.peer-reviewPor pareses_ES
dc.formatapplication/pdfes_ES
dc.identifier.citationSocquet, A., Piña, J., Jara, J., Cotton, F., Walpersdorf, A., Cotte, N., ... Norabuena, E. (2017). An 8 month slow slip event triggers progressive nucleation of the 2014 Chile megathrust.==$Geophysical Research Letters, 44$==(9), 4046-4053. https://doi.org/10.1002/2017GL073023es_ES
dc.identifier.doihttps://doi.org/10.1002/2017GL073023es_ES
dc.identifier.govdocindex-oti2018
dc.identifier.journalGeophysical Research Letterses_ES
dc.identifier.urihttp://hdl.handle.net/20.500.12816/2236
dc.language.isoenges_ES
dc.publisherAmerican Geophysical Uniones_ES
dc.relation.ispartofurn:issn:0094-8276
dc.rightsinfo:eu-repo/semantics/openAccesses_ES
dc.rights.urihttps://creativecommons.org/licences/by/4.0/es_ES
dc.subjectEarthquakeses_ES
dc.subjectSeismic stationes_ES
dc.subjectGlobal positioning systemes_ES
dc.subjectLandslideses_ES
dc.subjectSubductiones_ES
dc.subjectEarthworkses_ES
dc.subjectSeismologyes_ES
dc.subject.ocdehttp://purl.org/pe-repo/ocde/ford#1.05.00es_ES
dc.subject.ocdehttp://purl.org/pe-repo/ocde/ford#1.05.04es_ES
dc.titleAn 8 month slow slip event triggers progressive nucleation of the 2014 Chile megathrustes_ES
dc.typeinfo:eu-repo/semantics/articlees_ES

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