Please use this identifier to cite or link to this item: http://hdl.handle.net/2122/3206
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dc.contributor.authorallCannelli, V.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma1, Roma, Italiaen
dc.contributor.authorallMelini, D.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma1, Roma, Italiaen
dc.contributor.authorallDe Michelis, P.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italiaen
dc.contributor.authorallPiersanti, A.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma1, Roma, Italiaen
dc.contributor.authorallFlorindo, F.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italiaen
dc.date.accessioned2007-12-13T12:24:25Zen
dc.date.available2007-12-13T12:24:25Zen
dc.date.issued2007en
dc.identifier.urihttp://hdl.handle.net/2122/3206en
dc.description.abstractThe deformation at the core–mantle boundary produced by the 2004 Sumatra earthquake is investigated by means of a semi-analytic theoretical model of global coseismic and postseismic deformation, predicting a millimetric coseismic perturbation over a large portion of the core–mantle boundary. Spectral features of such deformations are analysed and discussed. The time-dependent postseismic evolution of the elliptical part of the gravity field (J 2) is also computed for different asthenosphere viscosity models. Our results show that, for asthenospheric viscosities smaller than 1018 Pa s, the postseismic J 2 variation in the next years is expected to leave a detectable signal in geodetic observations.en
dc.language.isoEnglishen
dc.publisher.nameBlackwell Publishingen
dc.relation.ispartofGeophysical Journal Internationalen
dc.relation.ispartofseries/ 170 (2007)en
dc.subjectcore–mantle boundary, deformation, rheology, seismic modelling, spectral analysisen
dc.titleCore–mantle boundary deformations and J 2 variations resulting from the 2004 Sumatra earthquakeen
dc.typearticleen
dc.description.statusPublisheden
dc.type.QualityControlPeer-revieweden
dc.description.pagenumber718-724en
dc.subject.INGV04. Solid Earth::04.05. Geomagnetism::04.05.02. Geomagnetic field variations and reversalsen
dc.subject.INGV04. Solid Earth::04.07. Tectonophysics::04.07.02. Geodynamicsen
dc.identifier.doi10.1111/j.1365-246X.2007.03443.xen
dc.relation.referencesAlfonsi, L. & Spada, G., 1998. Effect of the subductions and trends in seismically induced Earth rotational variations, J. geophys. Res., 103(B4), 7351–7362. Banerjee, P., Pollitz, F.F., B¨urgmann, R., 2005. The size and duration of the Sumatra-Andaman earthquake from far-field static offsets, Science, 308, 1769–1772. Bloxham, J., Zatman, S. Dumberry, M., 2002. The origin of geomagnetic jerks, Nature, 420, 65–68. Boschi, E., Casarotti, E., Devoti, R., Melini, D., Pietrantonio, G., Riguzzi, F., 2006. Coseismic deformation induced by the Sumatra earthquake, J. Geodyn., 42(1–3), 52–62. Boschi, L., Piersanti, A. Spada, G., 2000. Global postseismic deformation: deep earthquakes, J. geophys. Res., 105,B1, 631–652. Chao, B.F. & Gross, R.S., 1987. Changes in the Earth’s rotation and lowdegree gravitational field induced by earthquakes, Geophys. J. Int., 91, 569–596. Chao, B.F. & Gross, R.S., 2005. Did the 26 December 2004 Sumatra, Indonesia, earthquake disrupt the Earth’s Rotation as the mass media have said?, Eos Trans. AGU, 86(1), 1–2. Cheng, M.K., Shum, C.K.&Tapley, B.D., 1997. Determination of long-term changes in the Earth’s gravity field from satellite laser ranging observations, J. geophys. Res., 102(B10), 22377–22390. Cox, C.M.&Chao, B.F., 2002. Detection of a large-scale mass redistribution in the terrestrial system since 1998, Science, 297, 831–833. Dumberry, M., 2005. Comment on “Could the Mw = 9.3 Sumatra earthquake trigger a geomagnetic jerk?”, Eos Trans. AGU, 86(38), 343. Dumberry, M. & Bloxham, J., 2004. Variations in the Earth’s gravity field caused by torsional oscillations in the core, Geophys. J. Int., 159, 417–434. Dziewonski, A. & Anderson, D., 1981. Preliminary Reference Earth Model, Phys. Earth Planet. Inter., 25,4, 297–356. Dziewonski, A. Chou, T.&Woodhouse J. 1981. Determination of earthquake source parameters from waveform data for studies of global and regional seismicity, J. geophys. Res., 86,4, 2825–2852. Florindo, F., De Michelis, P., Piersanti, A. Boschi, E., 2005. Could the Mw =9.3 Sumatra earthquake trigger a geomagnetic jerk?, Eos Trans. AGU, 86(12), 123. Florindo, F., De Michelis, P., Piersanti, A. Boschi, E., 2005. Reply to Comment by M. Dumberry, Eos Trans. AGU, 86(38), 343. Gross, R.S.&Chao, B.F., 2006. The rotational and gravitational signature of the December 26, 2004 Sumatran earthquake, Surv. Geophys., 27, 615– 632. Lambeck, K., 1980. The Earth’s variable rotation: geophysical causes and consequences, Cambridge Univ. Press, New York. Marquart, G., Steinberger, B. Niehuus, K., 2005. On the effect of a low viscosity astenosphere on the temporal change of the geoid – A challenge for future gravity missions, J. Geodyn., 39, 493–511. Mitrovica, J.X. & Forte, A.M., 2004. A new inference of mantle viscosity based upon joint inversion of convection and glacial isostatic adjustment data, Earth Planet. Sci. Lett., 225, 177–189. Nostro, C., Piersanti, A., Antonioli, A. Spada, G., 1999. Spherical versus flat models of coseismic and postseismic deformations, J. geophys. Res., 104(B6), 13115–13134. Park, J. et al., 2005. Earth’s Free Oscillations Excited by the 26 December 2004 Sumatra-Andaman Earthquake, Science, 308, 1139–1144. Piersanti, A., 1999. Postesismic deformation in Chile: Constrains on the asthenospheric viscosity, Geophys. Res. Lett., 26, 3157-3160. Piersanti, A., Spada, G., Sabadini, R. Bonafede, M., 1995. Global postseismic deformation, Geophys. J. Int., 120, 544–566. Pollitz, F.F., Burgmann, R. Romanowicz, B., 1998. Viscosity of oceanic asthenosphere inferred from remote triggering of eartquakes, Science, 280, 1245–1249. Sabadini, R., Yuen, D.A. Boschi, E., 1982. Polar wander and the forced responses of a rotating, multilayered, viscoelastic planet, Geophys. J. Int., 87, 2885–2903. Tsai, V.C., Nettles, M., Ekstr¨om, G. Dziewonski, A.M., 2005. Multiple CMT source analysis of the 2004 Sumatra earthquake, Geophys. Res. Lett., 32, L17304.en
dc.description.obiettivoSpecifico3.3. Geodinamica e struttura dell'interno della Terraen
dc.description.obiettivoSpecifico3.4. Geomagnetismoen
dc.description.journalTypeJCR Journalen
dc.description.fulltextreserveden
dc.contributor.authorCannelli, V.en
dc.contributor.authorMelini, D.en
dc.contributor.authorDe Michelis, P.en
dc.contributor.authorPiersanti, A.en
dc.contributor.authorFlorindo, F.en
dc.contributor.departmentIstituto Nazionale di Geofisica e Vulcanologia, Sezione Roma1, Roma, Italiaen
dc.contributor.departmentIstituto Nazionale di Geofisica e Vulcanologia, Sezione Roma1, Roma, Italiaen
dc.contributor.departmentIstituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italiaen
dc.contributor.departmentIstituto Nazionale di Geofisica e Vulcanologia, Sezione Roma1, Roma, Italiaen
dc.contributor.departmentIstituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italiaen
item.openairetypearticle-
item.cerifentitytypePublications-
item.languageiso639-1en-
item.grantfulltextrestricted-
item.openairecristypehttp://purl.org/coar/resource_type/c_18cf-
item.fulltextWith Fulltext-
crisitem.author.deptIstituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Roma1, Roma, Italia-
crisitem.author.deptIstituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Roma1, Roma, Italia-
crisitem.author.deptIstituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Roma2, Roma, Italia-
crisitem.author.deptIstituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Roma1, Roma, Italia-
crisitem.author.deptIstituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione AC, Roma, Italia-
crisitem.author.orcid0000-0002-6711-2264-
crisitem.author.orcid0000-0002-5383-2375-
crisitem.author.orcid0000-0002-2708-0739-
crisitem.author.orcid0000-0002-1814-5721-
crisitem.author.orcid0000-0002-6058-9748-
crisitem.author.parentorgIstituto Nazionale di Geofisica e Vulcanologia-
crisitem.author.parentorgIstituto Nazionale di Geofisica e Vulcanologia-
crisitem.author.parentorgIstituto Nazionale di Geofisica e Vulcanologia-
crisitem.author.parentorgIstituto Nazionale di Geofisica e Vulcanologia-
crisitem.author.parentorgIstituto Nazionale di Geofisica e Vulcanologia-
crisitem.classification.parent04. Solid Earth-
crisitem.classification.parent04. Solid Earth-
crisitem.department.parentorgIstituto Nazionale di Geofisica e Vulcanologia-
crisitem.department.parentorgIstituto Nazionale di Geofisica e Vulcanologia-
crisitem.department.parentorgIstituto Nazionale di Geofisica e Vulcanologia-
crisitem.department.parentorgIstituto Nazionale di Geofisica e Vulcanologia-
crisitem.department.parentorgIstituto Nazionale di Geofisica e Vulcanologia-
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