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dc.contributor.authorvan Dinther, Y.
dc.contributor.authorGerya, T. V.
dc.contributor.authorDalguer, L. A.
dc.contributor.authorCorbi, F.
dc.contributor.authorFuniciello, F.
dc.contributor.authorMai, Paul Martin
dc.date.accessioned2015-05-04T16:26:13Z
dc.date.available2015-05-04T16:26:13Z
dc.date.issued2013-04-25
dc.identifier.citationThe seismic cycle at subduction thrusts: 2. Dynamic implications of geodynamic simulations validated with laboratory models 2013, 118 (4):1502 Journal of Geophysical Research: Solid Earth
dc.identifier.issn21699313
dc.identifier.doi10.1029/2012JB009479
dc.identifier.urihttp://hdl.handle.net/10754/552151
dc.description.abstractThe physics governing the seismic cycle at seismically active subduction zones remains poorly understood due to restricted direct observations in time and space. To investigate subduction zone dynamics and associated interplate seismicity, we validate a continuum, visco-elasto-plastic numerical model with a new laboratory approach (Paper 1). The analogous laboratory setup includes a visco-elastic gelatin wedge underthrusted by a rigid plate with defined velocity-weakening and -strengthening regions. Our geodynamic simulation approach includes velocity-weakening friction to spontaneously generate a series of fast frictional instabilities that correspond to analog earthquakes. A match between numerical and laboratory source parameters is obtained when velocity-strengthening is applied in the aseismic regions to stabilize the rupture. Spontaneous evolution of absolute stresses leads to nucleation by coalescence of neighboring patches, mainly occurring at evolving asperities near the seismogenic zone limits. Consequently, a crack-, or occasionally even pulse-like, rupture propagates toward the opposite side of the seismogenic zone by increasing stresses ahead of its rupture front, until it arrests on a barrier. The resulting surface displacements qualitatively agree with geodetic observations and show landward and, from near the downdip limit, upward interseismic motions. These are rebound and reversed coseismically. This slip increases adjacent stresses, which are relaxed postseismically by afterslip and thereby produce persistent seaward motions. The wide range of observed physical phenomena, including back-propagation and repeated slip, and the agreement with laboratory results demonstrate that visco-elasto-plastic geodynamic models with rate-dependent friction form a new tool that can greatly contribute to our understanding of the seismic cycle at subduction zones.
dc.publisherAmerican Geophysical Union (AGU)
dc.relation.urlhttp://doi.wiley.com/10.1029/2012JB009479
dc.rightsArchived with thanks to Journal of Geophysical Research: Solid Earth
dc.titleThe seismic cycle at subduction thrusts: 2. Dynamic implications of geodynamic simulations validated with laboratory models
dc.typeArticle
dc.contributor.departmentComputational Earthquake Seismology (CES) Research Group
dc.contributor.departmentEarth Science and Engineering Program
dc.contributor.departmentPhysical Science and Engineering (PSE) Division
dc.identifier.journalJournal of Geophysical Research: Solid Earth
dc.eprint.versionPublisher's Version/PDF
dc.contributor.institutionInstitute of Geophysics; ETH Zürich; Zürich; Switzerland
dc.contributor.institutionSwiss Seismological Service; ETH Zürich; Zürich; Switzerland
dc.contributor.institutionLET-Laboratory of Experimental Tectonics, Univ. “Roma Tre”; Roma; Italy
dc.contributor.institutionLET-Laboratory of Experimental Tectonics, Univ. “Roma Tre”; Roma; Italy
kaust.personMai, Paul Martin
refterms.dateFOA2018-06-13T18:08:54Z
dc.date.published-online2013-04-25
dc.date.published-print2013-04


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