Please use this identifier to cite or link to this item:
http://hdl.handle.net/2122/8835
DC Field | Value | Language |
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dc.contributor.authorall | Prudencio, I.; Instituto Andaluz de Geofısica, Campus de Cartuja, University of Granada, E-18071 Granada, Spain | en |
dc.contributor.authorall | Del Pezzo, E.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione OV, Napoli, Italia | en |
dc.contributor.authorall | Garcia-Yeguas, A.; Instituto Andaluz de Geofısica, Campus de Cartuja, University of Granada, E-18071 Granada, Spain | en |
dc.contributor.authorall | Ibanez, J.; Instituto Andaluz de Geofısica, Campus de Cartuja, University of Granada, E-18071 Granada, Spain | en |
dc.date.accessioned | 2013-12-05T15:03:38Z | en |
dc.date.available | 2013-12-05T15:03:38Z | en |
dc.date.issued | 2013 | en |
dc.identifier.uri | http://hdl.handle.net/2122/8835 | en |
dc.description.abstract | The complex volcanic system of Tenerife Island is known to have a highly heterogeneous character, as recently confirmed by velocity tomography.We present new information derived from intrinsic quality factor inverse maps (Qi −1), scattering quality factor inverse maps (Qs −1) and total quality factor inverse maps (Qt −1) obtained for the same region. The data set used in this work is the result of the analysis of an active seismic experiment carried out, using offshore shots (air guns) recorded at over 85 onshore seismic stations. The estimates of the attenuation parameters are based on the assumption that the seismogram energy envelopes are determined by seismic energy diffusion processes occurring inside the island. Diffusion model parameters, proportional to Qi −1 and to Qs −1, are estimated from the inversion of the energy envelopes for any source–receiver couple. They are then weighted with a new graphical approach based on a Gaussian space probability function, which allowed us to create ‘2-D probabilistic maps’ representing the space distribution of the attenuation parameters. The 2-D images obtained reveal the existence of a zone in the centre of the island characterized by the lowest attenuation effects. This effect is interpreted as highly rigid and cooled rocks. This low-attenuation region is bordered by zones of high attenuation, associated with the recent historical volcanic activity. We calculate the transport mean free path obtaining a value of around 4 km for the frequency range 6–12 Hz. This result is two orders of magnitude smaller than values calculated for the crust of the Earth. An absorption length between 10 and 14 km is associated with the average intrinsic attenuation parameter. These values, while small in the context of tectonic regions, are greater than those obtained in volcanic regions such as Vesuvius or Merapi. Such differences may be explained by the magnitude of the region of study, over three times larger than the aforementioned study areas. This also implies deeper sampling of the crust, which is evidenced by a change in the values of seismic attenuation. One important observation is that scattering attenuation dominates over the intrinsic effects, Qi being at least twice the value of Qs. | en |
dc.description.sponsorship | This work has been partially supported by the Spanish project Ephestos, CGL2011-29499-C02-01, by the EU project EC-FP7 MEDiterranean SUpersite Volcanoes (MED-SUV), by the Basque Government researcher training program BFI09.277 and by the Regional project ‘Grupo de Investigaci´on en Geof´ısica y Sismolog´ıa de la Junta de Andaluc´ıa, RNM104’. EdP has been partly supported by DPC-INGV projects UNREST SPEED and V2 (Precursori). | en |
dc.language.iso | English | en |
dc.publisher.name | Wiley-Blackwell | en |
dc.relation.ispartof | Geophysical Journal International | en |
dc.relation.ispartofseries | /195 (2013) | en |
dc.subject | Seismic attenuation | en |
dc.subject | ; Seismic tomography; | en |
dc.subject | Volcano seismology | en |
dc.subject | Wave propagation. | en |
dc.title | Spatial distribution of intrinsic and scattering seismic attenuation in active volcanic islands – I: model and the case of Tenerife Island | en |
dc.type | article | en |
dc.description.status | Published | en |
dc.type.QualityControl | Peer-reviewed | en |
dc.description.pagenumber | 1942-1956 | en |
dc.subject.INGV | 04. Solid Earth::04.06. Seismology::04.06.07. Tomography and anisotropy | en |
dc.subject.INGV | 04. Solid Earth::04.06. Seismology::04.06.08. Volcano seismology | en |
dc.subject.INGV | 04. Solid Earth::04.06. Seismology::04.06.09. Waves and wave analysis | en |
dc.identifier.doi | 10.1093/gji/ggt361 | en |
dc.description.obiettivoSpecifico | 3.1. Fisica dei terremoti | en |
dc.description.obiettivoSpecifico | 3.3. Geodinamica e struttura dell'interno della Terra | en |
dc.description.journalType | JCR Journal | en |
dc.description.fulltext | restricted | en |
dc.relation.issn | 0956-540X | en |
dc.relation.eissn | 1365-246X | en |
dc.contributor.author | Prudencio, I. | en |
dc.contributor.author | Del Pezzo, E. | en |
dc.contributor.author | Garcia-Yeguas, A. | en |
dc.contributor.author | Ibanez, J. | en |
dc.contributor.department | Instituto Andaluz de Geofısica, Campus de Cartuja, University of Granada, E-18071 Granada, Spain | en |
dc.contributor.department | Istituto Nazionale di Geofisica e Vulcanologia, Sezione OV, Napoli, Italia | en |
dc.contributor.department | Instituto Andaluz de Geofısica, Campus de Cartuja, University of Granada, E-18071 Granada, Spain | en |
dc.contributor.department | Instituto Andaluz de Geofısica, Campus de Cartuja, University of Granada, E-18071 Granada, Spain | en |
item.openairetype | article | - |
item.cerifentitytype | Publications | - |
item.languageiso639-1 | en | - |
item.grantfulltext | restricted | - |
item.openairecristype | http://purl.org/coar/resource_type/c_18cf | - |
item.fulltext | With Fulltext | - |
crisitem.author.dept | Instituto Andaluz de Geofisica, Universidad de Granada | - |
crisitem.author.dept | Istituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione OV, Napoli, Italia | - |
crisitem.author.dept | Instituto Andaluz de Geofísica, Universidad de Granada, Granada, Spain | - |
crisitem.author.dept | Instituto Andaluz de Geofísica, University of Granada, Granada, Spain, | - |
crisitem.author.orcid | 0000-0003-1755-3771 | - |
crisitem.author.orcid | 0000-0002-6981-5967 | - |
crisitem.author.orcid | 0000-0002-9846-8781 | - |
crisitem.author.parentorg | Istituto Nazionale di Geofisica e Vulcanologia | - |
crisitem.classification.parent | 04. Solid Earth | - |
crisitem.classification.parent | 04. Solid Earth | - |
crisitem.classification.parent | 04. Solid Earth | - |
crisitem.department.parentorg | Istituto Nazionale di Geofisica e Vulcanologia | - |
Appears in Collections: | Article published / in press |
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Geophys J Int 2013 Prudencio-1.pdf | Main article + Figures | 8.61 MB | Adobe PDF |
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