Please use this identifier to cite or link to this item: http://hdl.handle.net/2122/636
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dc.contributor.authorallDalla Via, G.; Università degli Studi di Milano, Dipartimento di Scienze della Terra, sezione di Geofisica-
dc.contributor.authorallSabadini, R.; Università degli Studi di Milano, Dipartimento di Scienze della Terra, sezione di Geofisica-
dc.contributor.authorallDe Natale, G.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione OV, Napoli, Italia-
dc.contributor.authorallPingue, F.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione OV, Napoli, Italia-
dc.date.accessioned2006-01-26T11:43:01Z-
dc.date.available2006-01-26T11:43:01Z-
dc.date.issued2005-
dc.identifier.urihttp://hdl.handle.net/2122/636-
dc.description.abstractPostseismic relaxation is modeled for the Irpinia earthquake, which struck southern Italy in 1980. Our goal is to understand the mechanism of surface deformation due to stress relaxation in the deep portion of the crust-lithosphere system for a shallow normal fault source and to infer the rheological properties of the lithosphere in the extensional environment of peninsular Italy. The modeling is carried out within the framework of our normal mode viscoelastic theory at high spatial resolution in order to accurately resolve the vertical surface displacements for a seismic source. The slip distribution over the faults is first inverted from coseismic leveling data, the misfit between observed and modeled vertical displacements being minimized by means of the L2 norm. Slip distribution is then used within the viscoelastic model to invert for the viscosities of the lower crust and generally of the lithosphere. Inversion is based on leveling data sampled along three lines crossing the epicentral area. Postseismic deformation in the Irpinia area is characterized by a broad region of crust upwarping in the footwall of the major fault and downwarping in the hanging wall that is responsible for the long-wavelength features of the vertical displacement pattern. The c2 analysis indicates that the Irpinia earthquake cannot constrain the rheology of the upper mantle but only of the crust; a full search in the viscosity spaces makes it possible to constrain the crustal viscosity to values of the order of 1019 Pa s, in agreement with previous studies carried out in different tectonic environments.en
dc.format.extent419 bytes-
dc.format.extent623618 bytes-
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dc.format.mimetypeapplication/pdf-
dc.language.isoengen
dc.publisher.nameAmerican Geophysical Unionen
dc.relation.ispartofJournal of Geophysical Researchen
dc.relation.ispartofseries110, B06311en
dc.subjectLithospheric rheologyen
dc.subjectIrpinia earthquakeen
dc.titleLithospheric rheology in southern Italy inferred from postseismic viscoelastic relaxation following the 1980 Irpinia earthquakeen
dc.typearticle-
dc.description.statuspublished-
dc.type.QualityControlPeer-revieweden
dc.description.pagenumber1-16en
dc.identifier.URLwww.agu.orgen
dc.subject.INGV04. Solid Earth::04.01. Earth Interior::04.01.05. Rheologyen
dc.subject.INGV04. Solid Earth::04.07. Tectonophysics::04.07.02. Geodynamicsen
dc.subject.INGV04. Solid Earth::04.07. Tectonophysics::04.07.05. Stressen
dc.identifier.doi10.1029/2004JB003539en
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dc.description.fulltextpartially_openen
dc.contributor.authorDalla Via, G.-
dc.contributor.authorSabadini, R.-
dc.contributor.authorDe Natale, G.-
dc.contributor.authorPingue, F.-
dc.contributor.departmentUniversità degli Studi di Milano, Dipartimento di Scienze della Terra, sezione di Geofisica-
dc.contributor.departmentUniversità degli Studi di Milano, Dipartimento di Scienze della Terra, sezione di Geofisica-
dc.contributor.departmentIstituto Nazionale di Geofisica e Vulcanologia, Sezione OV, Napoli, Italia-
dc.contributor.departmentIstituto Nazionale di Geofisica e Vulcanologia, Sezione OV, Napoli, Italia-
item.grantfulltextrestricted-
item.fulltextWith Fulltext-
crisitem.classification.parent04. Solid Earth-
crisitem.classification.parent04. Solid Earth-
crisitem.author.deptUniversit`a di Milano - Milan, Italy-
crisitem.author.deptIstituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione OV, Napoli, Italia-
crisitem.author.deptIstituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione OV, Napoli, Italia-
crisitem.author.deptIstituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione OV, Napoli, Italia-
crisitem.author.parentorgIstituto Nazionale di Geofisica e Vulcanologia-
crisitem.author.parentorgIstituto Nazionale di Geofisica e Vulcanologia-
crisitem.author.parentorgIstituto Nazionale di Geofisica e Vulcanologia-
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