Please use this identifier to cite or link to this item: http://hdl.handle.net/2122/5952
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dc.contributor.authorallScandura, Danilaen
dc.date.accessioned2010-03-05T15:52:34Zen
dc.date.available2010-03-05T15:52:34Zen
dc.date.issued2009en
dc.identifier.urihttp://hdl.handle.net/2122/5952en
dc.description.abstractThe strain-stress state generated by faulting or cracking and influenced by the strong heterogeneity of the internal earth structure precedes and accompanies volcanic and seismic activity. Particularly, volcanic eruptions are the culmination of long and complex geophysical processes and physical processes which involve the generation of magmas in the mantle or in the lower crust, its ascent to shallower levels, its storage and differentiation in shallow crustal chambers, and, finally, its eruption at the Earth’s surface. Instead, earthquakes are a frictional stick-slip instability arising along pre-existing faults within the brittle crust of the Earth. Long-term tectonic plate motion causes stress to accumulate around faults until the frictional strength of the fault is exceeded. The study of these processes has been traditionally carried out through different geological disciplines, such as petrology, structural geology, geochemistry or sedimentology. Nevertheless, during the last two decades, the development of physical of earth as well as the introduction of new powerful numerical techniques has progressively converted geophysics into a multidisciplinary science. Nowadays, scientists with very different background and expertises such as geologist, physicists, chemists, mathematicians and engineers work on geophysics. As any multidisciplinary field, it has been largely benefited from these collaborations. The different ways and procedures to face the study of volcanic and seismic phenomena do not exclude each other and should be regarded as complementary. Nowadays, numerical modeling in volcanology covers different pre-eruptive, eruptive and post-eruptive aspects of the general volcanic phenomena. Among these aspects, the pre-eruptive process, linked to the continuous monitoring, is of special interest because it contributes to evaluate the volcanic risk and it is crucial for hazard assessment, eruption prediction and risk mitigation at volcanic unrest. large faults. The knowledge of the actual activity state of these sites is not only an academic topic but it has crucial importance in terms of public security and eruption and earthquake forecast. However, numerical simulation of volcanic and seismic processes have been traditionally developed introducing several simplifications: homogeneous half-space, flat topography and elastic rheology. These simplified assumptions disregards effects caused by topography, presence of medium heterogeneity and anelastic rheology, while they could play an important role in Moreover, frictional sliding of a earthquake generates seismic waves that travel through the earth, causing major damage in places nearby to the modeling procedure This thesis presents mathematical modeling and numerical simulations of volcanic and seismic processes. The subject of major interest has been concerned on the developing of mathematical formulations to describe seismic and volcanic process. The interpretation of geophysical parameters requires numerical models and algorithms to define the optimal source parameters which justify observed variations. In this work we use the finite element method that allows the definition of real topography into the computational domain, medium heterogeneity inferred from seismic tomography study and the use of complex rheologies. Numerical forward method have been applied to obtain solutions of ground deformation expected during volcanic unrest and post-seismic phases, and an automated procedure for geodetic data inversion was proposed for evaluating slip distribution along surface rupture.en
dc.description.sponsorshipIstituto Nazionale di Geofisica e Vulcanologia, Sezione di Cataniaen
dc.language.isoEnglishen
dc.subjectstress-strain stateen
dc.subjectvolcanic areasen
dc.subjectseismic areaen
dc.subjectNumerical modelingen
dc.titlePhysical-Mathematical modeling and numerical simulations of stress-strain state in seismic and volcanic regionsen
dc.typethesisen
dc.description.statusUnpublisheden
dc.subject.INGV04. Solid Earth::04.01. Earth Interior::04.01.05. Rheologyen
dc.subject.INGV04. Solid Earth::04.03. Geodesy::04.03.01. Crustal deformationsen
dc.subject.INGV04. Solid Earth::04.03. Geodesy::04.03.08. Theory and Modelsen
dc.subject.INGV04. Solid Earth::04.06. Seismology::04.06.01. Earthquake faults: properties and evolutionen
dc.subject.INGV04. Solid Earth::04.06. Seismology::04.06.04. Ground motionen
dc.subject.INGV04. Solid Earth::04.07. Tectonophysics::04.07.03. Heat generation and transporten
dc.subject.INGV04. Solid Earth::04.07. Tectonophysics::04.07.05. Stressen
dc.subject.INGV04. Solid Earth::04.08. Volcanology::04.08.06. Volcano monitoringen
dc.subject.INGV04. Solid Earth::04.08. Volcanology::04.08.08. Volcanic risken
dc.subject.INGV05. General::05.01. Computational geophysics::05.01.03. Inverse methodsen
dc.subject.INGV05. General::05.02. Data dissemination::05.02.02. Seismological dataen
dc.subject.INGV05. General::05.02. Data dissemination::05.02.03. Volcanic eruptionsen
dc.subject.INGV05. General::05.05. Mathematical geophysics::05.05.99. General or miscellaneousen
dc.type.methodPhDen
dc.description.obiettivoSpecifico3.6. Fisica del vulcanismoen
dc.description.fulltextopenen
dc.contributor.authorScandura, Danilaen
item.openairetypethesis-
item.cerifentitytypePublications-
item.languageiso639-1en-
item.grantfulltextopen-
item.openairecristypehttp://purl.org/coar/resource_type/c_46ec-
item.fulltextWith Fulltext-
crisitem.author.deptIstituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione OE, Catania, Italia-
crisitem.author.parentorgIstituto Nazionale di Geofisica e Vulcanologia-
crisitem.classification.parent04. Solid Earth-
crisitem.classification.parent04. Solid Earth-
crisitem.classification.parent04. Solid Earth-
crisitem.classification.parent04. Solid Earth-
crisitem.classification.parent04. Solid Earth-
crisitem.classification.parent04. Solid Earth-
crisitem.classification.parent04. Solid Earth-
crisitem.classification.parent04. Solid Earth-
crisitem.classification.parent04. Solid Earth-
crisitem.classification.parent05. General-
crisitem.classification.parent05. General-
crisitem.classification.parent05. General-
crisitem.classification.parent05. General-
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