A mixed seismic–aseismic stress release episode in the Andean subduction zone

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dc.contributor.authorVillegas Lanza, Juan Carlos
dc.contributor.authorNocquet, J. M.
dc.contributor.authorRolandone, F.
dc.contributor.authorVallée, M.
dc.contributor.authorTavera, Hernando
dc.contributor.authorBondoux, Francis
dc.contributor.authorTran, T.
dc.contributor.authorMartin, X.
dc.contributor.authorChlieh, Mohamed
dc.coverage.spatialAndes
dc.date.accessioned2018-08-08T14:47:10Z
dc.date.available2018-08-08T14:47:10Z
dc.date.issued2016
dc.description.abstractIn subduction zones, stress is released by earthquakes and transient aseismic slip. The latter falls into two categories: slow slip and afterslip. Slow-slip events emerge spontaneously during the interseismic phase, and show a progressive acceleration of slip with a negligible contribution of synchronous tremors or microseismicity to the energy, or moment release. In contrast, afterslip occurs immediately after large and moderate earthquakes, decelerates over time, and releases between 20 and 400% of the moment released by the preceding earthquake. Here we use seismic and GPS data to identify transient aseismic slip that does not fit into either of these categories. We document a seismic–aseismic slip sequence which occurred at shallow depths along a weakly coupled part of the Andean subduction zone19 in northern Peru and lasted seven months. The sequence generated several moderate earthquakes that together account for about 25% of the total moment released during the full sequence, equivalent to magnitude 6.7. Transient slip immediately followed two of the earthquakes, with slip slowing at a logarithmic rate. Considered separately, the moment released by transient slip following the second earthquake was more than 1,000% of the moment released during the earthquake itself, a value incompatible with classical models of afterslip. Synchronous seismic swarms and aseismic slip may therefore define a stress-release process that is distinct from slow-slip events and afterslip.es_ES
dc.description.peer-reviewPor pareses_ES
dc.formatapplication/pdfes_ES
dc.identifier.citationVillegas-Lanza, J. C., Nocquet, J.-M., Rolandone, F., Vallée, M., Tavera, H., Bondoux, F., ... Chlieh, M. (2016). A mixed seismic–aseismic stress release episode in the Andean subduction zone.==$Nature Geoscience, 9,$==150-154. https://doi.org/10.1038/ngeo2620es_ES
dc.identifier.doihttps://doi.org/10.1038/ngeo2620es_ES
dc.identifier.govdocindex-oti2018
dc.identifier.journalNature Geosciencees_ES
dc.identifier.urihttp://hdl.handle.net/20.500.12816/2312
dc.language.isoenges_ES
dc.publisherNature Researches_ES
dc.relation.ispartofurn:issn:1752-0894
dc.rightsinfo:eu-repo/semantics/closedAccesses_ES
dc.subjectGeologyes_ES
dc.subjectSeismologyes_ES
dc.subjectTectonicses_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.subject.ocdehttp://purl.org/pe-repo/ocde/ford#1.05.06es_ES
dc.titleA mixed seismic–aseismic stress release episode in the Andean subduction zonees_ES
dc.typeinfo:eu-repo/semantics/articlees_ES

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