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dc.contributor.author
Alvarez Pontoriero, Orlando
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dc.contributor.author
Gimenez, Mario Ernesto
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dc.contributor.author
Folguera Telichevsky, Andres
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dc.contributor.author
Moreno Chaves, Carlos Alberto
dc.contributor.author
Braitenberg, Carla
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dc.date.available
2022-04-22T15:51:07Z
dc.date.issued
2019-10-20
dc.identifier.citation
Alvarez Pontoriero, Orlando; Gimenez, Mario Ernesto; Folguera Telichevsky, Andres; Moreno Chaves, Carlos Alberto; Braitenberg, Carla; Reviewing megathrust slip behavior for recent Mw > 8.0 earthquakes along the Peru-Chilean margin from satellite GOCE gravity field derivatives; Elsevier Science; Tectonophysics; 769; 20-10-2019; 1-21
dc.identifier.issn
0040-1951
dc.identifier.uri
http://hdl.handle.net/11336/155573
dc.description.abstract
The characterization of a seismogenic zone associated with the rupture process that occurs during great megathrust earthquakes has been approached from different perspectives. Different studies lightened the structural complexity and compositional heterogeneity of the interplate region. In this work, we address this relationship from the analysis of density contrasts provided by satellite gravity data and comparing these results with slip behavior along the rupture zone. We performed the calculation of gravity anomalies and gradients both corrected by the effect of topography and sediments. Then we analyzed this relation with the rupture zones of four megathrust earthquakes Mw > 8 along the Peru-Chilean coast, associated with the largest earthquakes that occurred in the last years along this setting, finding that the maximum vertical displacements were located close to gravity minimums in the forearc zone. We finally obtained density models by inverting four trench-parallel profiles from the Gravity disturbance, finding low-density contrasts related to the maximum slips, and high density contrasts at its edges related to a decrease of the displacement or to the lateral ending of the rupture. The along-strike seismic segmentation observed previously in the gravity derivatives is also observed along dip, being slip increased at gravity lows and arrested at gravity highs, probably indicating that the forearc structure plays a key role in across strike rupture behavior in depth. Our results agree with the hypothesis that persistent tectonic features, modeled at a high degree by the oceanic plate morphology, may control strain accumulation and release along the megathrust.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Elsevier Science
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dc.rights
info:eu-repo/semantics/restrictedAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
MEGATHRUST EARTHQUAKES
dc.subject
GOCE
dc.subject
RUPTURE AREA
dc.subject
SEISMIC HAZARD
dc.subject
CHILE
dc.subject
SUBDUCTION ZONES
dc.subject.classification
Geoquímica y Geofísica
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dc.subject.classification
Ciencias de la Tierra y relacionadas con el Medio Ambiente
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dc.subject.classification
CIENCIAS NATURALES Y EXACTAS
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dc.title
Reviewing megathrust slip behavior for recent Mw > 8.0 earthquakes along the Peru-Chilean margin from satellite GOCE gravity field derivatives
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2022-04-20T14:39:32Z
dc.identifier.eissn
1879-3266
dc.journal.volume
769
dc.journal.pagination
1-21
dc.journal.pais
Países Bajos
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dc.journal.ciudad
Amsterdam
dc.description.fil
Fil: Alvarez Pontoriero, Orlando. Universidad Nacional de San Juan. Facultad de Ciencias Exactas, Físicas y Naturales. Instituto Geofísico Sismológico Volponi; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Juan; Argentina
dc.description.fil
Fil: Gimenez, Mario Ernesto. Universidad Nacional de San Juan. Facultad de Ciencias Exactas, Físicas y Naturales. Instituto Geofísico Sismológico Volponi; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Juan; Argentina
dc.description.fil
Fil: Folguera Telichevsky, Andres. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Ciencias Geologicas. Instituto de Estudios Andinos "Don Pablo Groeber"; Argentina
dc.description.fil
Fil: Moreno Chaves, Carlos Alberto. Universidade do Sao Paulo. Instituto de Astronomia, Geofísica e Ciências Atmosféricas; Brasil
dc.description.fil
Fil: Braitenberg, Carla. Universita degli Studi di Trieste. Facolta di Scienze Matematiche. Fisiche e Naturali. Dipartimento di Geoscienze; Italia
dc.journal.title
Tectonophysics
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dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/abs/pii/S0040195119302951
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1016/j.tecto.2019.228188
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