Postseismic relocking of the subduction megathrust following the 2007 Pisco, Peru, earthquake

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dc.contributor.authorRemy, D.
dc.contributor.authorPerfettini, Hugo
dc.contributor.authorCotte, N.
dc.contributor.authorAvouac, J. P.
dc.contributor.authorChlieh, Mohamed
dc.contributor.authorBondoux, Francis
dc.contributor.authorSladen, A.
dc.contributor.authorTavera, Hernando
dc.contributor.authorSocquet, A.
dc.coverage.spatialPisco
dc.coverage.spatialPerú
dc.date.accessioned2018-08-09T10:45:23Z
dc.date.available2018-08-09T10:45:23Z
dc.date.issued2016-05-03
dc.description.abstractCharacterizing the time evolution of slip over different phases of the seismic cycle is crucial to a better understanding of the factors controlling the occurrence of large earthquakes. In this study, we take advantage of interferometric synthetic aperture radar data and 3.5 years of continuous Global Positioning System (GPS) measurements to determine interseismic, coseismic, and postseismic slip distributions in the region of the 2007, Mw 8.0 Pisco, earthquake, Peru, using the same fault geometry and inversion method. Our interseismic model, based on pre‐2007 campaign GPS data, suggests that the 2007 Pisco seismic slip occurred in a region strongly coupled before the earthquake while afterslip occurred in low coupled regions. Large afterslip occurred in the peripheral area of coseismic rupture in agreement with the notion that afterslip is mainly induced by coseismic stress changes. The temporal evolution of the region of maximum afterslip, characterized by a relaxation time of about 2.3 years, is located in the region where the Nazca ridge is subducting, consistent with rate‐strengthening friction promoting aseismic slip. We estimate a return period for the Pisco earthquake of about 230 years with an estimated aseismic slip that might account for about 50% of the slip budget in this region over the 0–50 km seismogenic depth range. A major result of this study is that the main asperity that ruptured during the 2007 Pisco earthquake relocked soon after this event.es_ES
dc.description.peer-reviewPor pareses_ES
dc.formatapplication/pdfes_ES
dc.identifier.citationRemy, D., Perfettini, H., Cotte, N., Avouac, J. P., Chlieh, M., Bondoux, F., ... Socquet, A. (2016). Postseismic relocking of the subduction megathrust following the 2007 Pisco, Peru, earthquake.==$Journal of Geophysical Research: Solid Earth, 121$==(5), 3978-3995. https://doi.org/10.1002/2015JB012417es_ES
dc.identifier.doihttps://doi.org/10.1002/2015JB012417es_ES
dc.identifier.govdocindex-oti2018
dc.identifier.journalJournal of Geophysical Research: Solid Earthes_ES
dc.identifier.urihttp://hdl.handle.net/20.500.12816/2328
dc.language.isoenges_ES
dc.publisherAmerican Geophysical Uniones_ES
dc.relation.ispartofurn:issn:2169-9313
dc.rightsinfo:eu-repo/semantics/closedAccesses_ES
dc.subjectGPSes_ES
dc.subjectInSARes_ES
dc.subjectSeismic cyclees_ES
dc.subjectPostseismic slipes_ES
dc.subjectSlip budgetes_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.titlePostseismic relocking of the subduction megathrust following the 2007 Pisco, Peru, earthquakees_ES
dc.typeinfo:eu-repo/semantics/articlees_ES

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