Please use this identifier to cite or link to this item:
http://hdl.handle.net/2122/4954
DC Field | Value | Language |
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dc.contributor.authorall | Trasatti, E.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione CNT, Roma, Italia | en |
dc.contributor.authorall | Bonafede, M.; università degli Studi di Bologna | en |
dc.date.accessioned | 2009-03-16T11:30:59Z | en |
dc.date.available | 2009-03-16T11:30:59Z | en |
dc.date.issued | 2008-02 | en |
dc.identifier.uri | http://hdl.handle.net/2122/4954 | en |
dc.description.abstract | Employing 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.iso | English | en |
dc.publisher.name | INGV | en |
dc.relation.ispartof | Annals of Geophysics | en |
dc.relation.ispartofseries | 1/51 (2008) | en |
dc.relation.isversionof | http://hdl.handle.net/2122/2715 | en |
dc.subject | Campi Flegrei | en |
dc.subject | deformation | en |
dc.subject | gravity | en |
dc.subject | finite element method | en |
dc.subject | heterogeneous medium | en |
dc.title | Gravity changes due to overpressure sources in 3D heterogeneous media: application to Campi Flegrei caldera, Italy | en |
dc.type | article | en |
dc.description.status | Published | en |
dc.type.QualityControl | Peer-reviewed | en |
dc.description.pagenumber | 119-133 | en |
dc.subject.INGV | 04. Solid Earth::04.02. Exploration geophysics::04.02.02. Gravity methods | en |
dc.relation.references | BATTAGLIA, M., and P. SEGALL (2004): The interpretation of gravity changes and crustal deformation in active volcanic areas, Pure Appl. Geophys., doi: 10.1007/ s00024-004-2514-5. BATTAGLIA, M., C. TROISE, F. OBRIZZO, F. PINGUE and G. De NATALE (2006): Evidence for fluid migration as the source of deformation at Campi Flegrei caldera (Italy), Geophys. Res. Lett., doi: 10.1029/2005GL024904. BERRINO, G. (1994): Gravity changes induced by heightmass variations at Campi Flegrei caldera, J. Volcanol. Geotherm. Res., 61, 293-309. BERRINO, G., G. CORRADO, G. LUONGO and B. TORO (1984): Ground deformation and gravity change accompanying the 1984 Pozzuoli uplift, Bull. Volcanol., 47, 187-200. BONAFEDE, M. and M. MAZZANTI (1998): Modelling gravity variations consistent with ground deformation in the Campi Flegrei caldera (Italy), J. Volcanol. Geotherm. Res., 81, 137-157. BROCHER, T.M. (2005): Empirical relations between elastic wavespeeds and density in the earth’s crust, Bull. Seism. Soc. Am., 95, 2081-2092. BULLETTIN VOLCANOLOGIQUE (1984): The 1982-1984 bradyseismic crisis at Campi Flegrei, Italy, Bull. Volcanol., 47. CHIODINI, G., M. TODESCO, S. CALIRO, C. DEL GAUDIO, G. MACEDONIO and M. RUSSO (2003): Magma degassing as a trigger of bradyseismic event: the case of Phlegrean Fields (Italy), Geophys. Res. Lett., 30, doi: 10.1029/ 2002GL016790. CURRENTI, G., C. DEL NEGRO and G. GANCI (2007): Modelling of ground deformation and gravity fields using finite element method: an application to Etna volcano, Geophys. J. Int., 169, 775-786, doi: 10.1111/j.1365- 246X.2007.03380.x. DE NATALE, G., F. PINGUE, P. ALLARD and A. ZOLLO (1991): Geophysical and geochemical modelling of the 1982- 1984 unrest phenomena at Campi Flegrei caldera (Southern Italy), J. Volcanol. Geotherm. Res., 48, 199-222. DIETERICH, J.H. and R.W. DECKER (1975): Finite element modelling of surface deformation associated with volcanism, J. Geophys. Res., 80, 4094-4102. FERNANDEZ, J. and J.B. RUNDLE (1994): Gravity changes and deformation due to a magmatic intrusion in a two layered crustal model, J. Geophys. Res., 99, 2737-2746. FERNANDEZ, J., K.F. TIAMPO and J.B. RUNDLE (2001): Viscoelastic displacement and gravity changes due to point magmatic intrusions in a gravitational layered solid Earth, Geophys. J. Int., 146, 155-170. FRANCHINI, L. (2005): Deformazioni e variazioni della gravità in aree vulcaniche: influenza della struttura reologica, in italian, Università degli Studi di Bologna, Corso di Laurea Specialistica in Fisica. GOTTSMANN, J., H. RYMER and G. BERRINO (2006): Unrest at the Campi Flegrei caldera (Italy): a critical evaluation of source parameters from geodetic data inversion, J. Volcanol. Geotherm. Res., 150, 132-145. GREENBERG, M.D. (1978): Foundations of Applied Mathematics (Prentice-Hall, Inc., Englewood Cliffs, New Jersey), pp. 456. MARC (1994): Analysis Research Corporation (Palo Alto, CA). SASAI, Y. (1986): Multiple tension-crack model for dilatancy: surface displacement, gravity and magnetic change, Bull. Earth. Res. Inst., 61, 429-473. TRASATTI, E., C. GIUNCHI and M. BONAFEDE (2005): Structural and rheological constraints on source depth and overpressure estimates at the Campi Flegrei caldera, Italy, J. Volcanol. Geotherm. Res., 144, 105-118. TRASATTI, E., C. GIUNCHI and N.P. AGOSTINETTI (2008): Numerical inversion of deformation caused by pressure sources: application to Mt. Etna (Italy), Geophys. J. Int., 172, 873-884, doi: 10.111/j.1365-246x.2007.03677.x. WALSH, J.B. and J.R. RICE (1979): Local changes in gravity resulting from deformation, J. Geophys. Res., 84, 165-170. WANG, R.F., F.L. MARTÌN and F. ROTH (2006), PSGRN/ PSCMP a new code for calculating co- and post-seismic deformation, geoid and gravity changes based on the viscoelastic-gravitational dislocation theory, Comput. Geosci., 32, 527-541. YANG, X., P.M. DAVIS and J.H. DIETERICH (1988): Deformation from inflation of a dipping finite prolate spheroid in an elastic halfspace as a model for volcanic stressing, J. Geophys. Res., 93, 4249-4257. | en |
dc.description.obiettivoSpecifico | 3.6. Fisica del vulcanismo | en |
dc.description.journalType | JCR Journal | en |
dc.description.fulltext | open | en |
dc.contributor.author | Trasatti, E. | en |
dc.contributor.author | Bonafede, M. | en |
dc.contributor.department | Istituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione ONT, Roma, Italia | en |
dc.contributor.department | università degli Studi di Bologna | en |
item.openairetype | article | - |
item.cerifentitytype | Publications | - |
item.languageiso639-1 | en | - |
item.grantfulltext | open | - |
item.openairecristype | http://purl.org/coar/resource_type/c_18cf | - |
item.fulltext | With Fulltext | - |
crisitem.author.dept | Istituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione ONT, Roma, Italia | - |
crisitem.author.dept | University of Bologna | - |
crisitem.author.orcid | 0000-0002-2983-045X | - |
crisitem.author.parentorg | Istituto Nazionale di Geofisica e Vulcanologia | - |
crisitem.classification.parent | 04. Solid Earth | - |
crisitem.department.parentorg | Istituto Nazionale di Geofisica e Vulcanologia | - |
Appears in Collections: | Article published / in press Annals of Geophysics |
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cf gravita.pdf | 345.05 kB | Adobe PDF | View/Open |
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