Please use this identifier to cite or link to this item:
http://hdl.handle.net/2122/4231
DC Field | Value | Language |
---|---|---|
dc.contributor.authorall | Cannelli, V.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma1, Roma, Italia | en |
dc.contributor.authorall | Melini, D.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma1, Roma, Italia | en |
dc.contributor.authorall | Piersanti, A.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma1, Roma, Italia | en |
dc.contributor.authorall | Boschi, E.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione AC, Roma, Italia | en |
dc.date.accessioned | 2008-11-24T13:09:11Z | en |
dc.date.available | 2008-11-24T13:09:11Z | en |
dc.date.issued | 2008 | en |
dc.identifier.uri | http://hdl.handle.net/2122/4231 | en |
dc.description.abstract | We perform an extensive analysis of the low degree gravitt field harmonics measured by the GRACE mission, in order to find a signature of the postseismic relaxation following the 2004 Sumatra earthquake. We find a statistically significant perturbation in the secular trend of low degree zonal coefficients ($J_l$) in correspondence of the 2004 Sumatra earthquake, and a similar perturbation, but with weak associated statistical significance, also in the non-zonal coefficients. Technical features and results of such analysis are discussed. The time-dependent postseismic evolution of harmonic coefficients is modeled for various asthenosphere viscosity values, using a theoretical model of global postseismic deformation. The observed change in secular trend is found to be consistent with our modeling results but it cannot be used to discriminate between viscosities. A forward modeling of the perturbations to time-dependent zonal variation rates following the Sumatra earthquake for various astenospheric viscosities is provided. As a result, an evident signature of the Sumatra earthquake on $\dot{J}_l$ time series is expected for asthenospheric viscosity values below $10^{18}$ Pa s. Therefore, long term $\dot{J}_l$ time histories from SLR geodetic missions will be able to put constraints on the asthenosphere viscosity, if such a signature is evidenced from data or, at least, put lower limits if no significant perturbation will be observed. | en |
dc.language.iso | English | en |
dc.relation.ispartof | Journal of Geophysical Research | en |
dc.relation.ispartofseries | /113 (2008) | en |
dc.subject | low degree gravity harmonics | en |
dc.subject | postseismic relaxation | en |
dc.subject | Sumatra earthquake | en |
dc.title | Postseismic signature of the 2004 Sumatra earthquake on low degree gravity harmonics | en |
dc.type | article | en |
dc.description.status | Published | en |
dc.type.QualityControl | Peer-reviewed | en |
dc.description.pagenumber | B12414 | en |
dc.subject.INGV | 04. Solid Earth::04.03. Geodesy::04.03.99. General or miscellaneous | en |
dc.subject.INGV | 04. Solid Earth::04.07. Tectonophysics::04.07.99. General or miscellaneous | en |
dc.identifier.doi | 10.1029/2007JB005296 | en |
dc.description.obiettivoSpecifico | 3.3. Geodinamica e struttura dell'interno della Terra | en |
dc.description.journalType | JCR Journal | en |
dc.description.fulltext | open | en |
dc.contributor.author | Cannelli, V. | en |
dc.contributor.author | Melini, D. | en |
dc.contributor.author | Piersanti, A. | en |
dc.contributor.author | Boschi, E. | en |
dc.contributor.department | Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma1, Roma, Italia | en |
dc.contributor.department | Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma1, Roma, Italia | en |
dc.contributor.department | Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma1, Roma, Italia | en |
dc.contributor.department | Istituto Nazionale di Geofisica e Vulcanologia, Sezione AC, Roma, Italia | 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 Roma1, Roma, Italia | - |
crisitem.author.dept | Istituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Roma1, Roma, Italia | - |
crisitem.author.dept | Istituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Roma1, Roma, Italia | - |
crisitem.author.orcid | 0000-0002-6711-2264 | - |
crisitem.author.orcid | 0000-0002-5383-2375 | - |
crisitem.author.orcid | 0000-0002-1814-5721 | - |
crisitem.author.parentorg | Istituto Nazionale di Geofisica e Vulcanologia | - |
crisitem.author.parentorg | Istituto Nazionale di Geofisica e Vulcanologia | - |
crisitem.author.parentorg | Istituto Nazionale di Geofisica e Vulcanologia | - |
crisitem.classification.parent | 04. Solid Earth | - |
crisitem.classification.parent | 04. Solid Earth | - |
crisitem.department.parentorg | Istituto Nazionale di Geofisica e Vulcanologia | - |
crisitem.department.parentorg | Istituto Nazionale di Geofisica e Vulcanologia | - |
crisitem.department.parentorg | Istituto Nazionale di Geofisica e Vulcanologia | - |
crisitem.department.parentorg | Istituto Nazionale di Geofisica e Vulcanologia | - |
Appears in Collections: | Article published / in press |
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File | Description | Size | Format | |
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cannelli2008.pdf | 193.9 kB | Adobe PDF | View/Open |
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