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Please use this identifier to cite or link to this item: http://hdl.handle.net/2122/4954
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dc.contributor.authorallTrasatti, E.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione CNT, Roma, Italiaen
dc.contributor.authorallBonafede, M.; università degli Studi di Bolognaen
dc.date.accessioned2009-03-16T11:30:59Zen
dc.date.available2009-03-16T11:30:59Zen
dc.date.issued2008-02en
dc.identifier.urihttp://hdl.handle.net/2122/4954en
dc.description.abstractEmploying a 3D finite element method, we develop an algorithm to calculate gravity changes due to pressurized sources of any shape in elastic and inelastic heterogeneous media. We consider different source models, such as sphere, spheroid and sill, dilating in elastic media (homogeneous and heterogeneous) and in elasto-plastic media. The models are oriented to reproduce the gravity changes and the surface deformation observed at Campi Flegrei caldera (Italy), during the 1982-1984 unrest episode. The source shape and the characteristics of the medium have great influence on the calculated gravity changes, leading to very different values for the source densities. Indeed, the gravity residual strongly depends upon the shape of the source. Non negligible contributions also come from density and rigidity heterogeneities within the medium. Furthermore, if the caldera is elasto- plastic, the resulting gravity changes exhibit a pattern similar to that provided by a low effective rigidity. Even if the variation of the source volumes is quite similar for most of the models considered, the density inferred for the source ranges from ∼400 kg/m3 (super critical water) to ∼3300 kg/m3 (higher than trachytic basalts), with drastically different implications for risk assessment.en
dc.language.isoEnglishen
dc.publisher.nameINGVen
dc.relation.ispartofAnnals of Geophysicsen
dc.relation.ispartofseries1/51 (2008)en
dc.relation.isversionofhttp://hdl.handle.net/2122/2715en
dc.subjectCampi Flegreien
dc.subjectdeformationen
dc.subjectgravityen
dc.subjectfinite element methoden
dc.subjectheterogeneous mediumen
dc.titleGravity changes due to overpressure sources in 3D heterogeneous media: application to Campi Flegrei caldera, Italyen
dc.typearticleen
dc.description.statusPublisheden
dc.type.QualityControlPeer-revieweden
dc.description.pagenumber119-133en
dc.subject.INGV04. Solid Earth::04.02. Exploration geophysics::04.02.02. Gravity methodsen
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dc.description.obiettivoSpecifico3.6. Fisica del vulcanismoen
dc.description.journalTypeJCR Journalen
dc.description.fulltextopenen
dc.contributor.authorTrasatti, E.en
dc.contributor.authorBonafede, M.en
dc.contributor.departmentIstituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione ONT, Roma, Italiaen
dc.contributor.departmentuniversità degli Studi di Bolognaen
item.openairetypearticle-
item.cerifentitytypePublications-
item.languageiso639-1en-
item.grantfulltextopen-
item.openairecristypehttp://purl.org/coar/resource_type/c_18cf-
item.fulltextWith Fulltext-
crisitem.author.deptIstituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione ONT, Roma, Italia-
crisitem.author.deptUniversity of Bologna-
crisitem.author.orcid0000-0002-2983-045X-
crisitem.author.parentorgIstituto Nazionale di Geofisica e Vulcanologia-
crisitem.classification.parent04. Solid Earth-
crisitem.department.parentorgIstituto Nazionale di Geofisica e Vulcanologia-
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Annals of Geophysics
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