English   español  
Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/19872
Share/Impact:
Statistics
logo share SHARE logo core CORE   Add this article to your Mendeley library MendeleyBASE

Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL
Exportar a otros formatos:
DC FieldValueLanguage
dc.contributor.authorDiaz, J.-
dc.contributor.authorGallart Muset, Josep-
dc.contributor.authorGaspà Rebull, Oriol-
dc.contributor.authorCórdoba, Diego-
dc.date.issued2008-03-
dc.identifier.citationMarine Geology 249(1-2): 150-165(2008)en_US
dc.identifier.issn0025-3227-
dc.identifier.uri10261/19872-
dc.description.abstractAn evaluation of the geological hazard related to the sinking of the Prestige oil-tanker in November 2002 in the Galicia margin, NW of Iberia, was supported by the Spanish research agency. It included a specific seismic study of the local activity and of the regional seismicity in this margin, results of which are presented here. Published global catalogues show that diffuse seismicity of moderate magnitude (events up to 5.6 mb) can be associated with the Northern flank of the Galicia Margin, with a roughly E–W distribution. However, event locations in this area are poorly constrained due to the inappropriate geometry of permanent seismic networks. We collected and analyzed new data from a dense deployment of 10 OBS around the wreck site and from a network of 12 land stations at the NW corner of Iberia. During a 7 months operation period, the land network permitted location of 120 events with magnitudes ranging from 1.6 to 4.8, more than 30% of which were not reported by the Spanish permanent array, confirming the existence of a moderate seismicity in this area. Five new focal solutions have been obtained for events on-land, providing additional information about the active faults in the region. The OBS network ran for 1 month and allowed the location of three earthquakes of magnitude≤2.5 near the sinking site. Four more events have been identified, with just a rough determination of their epicenters based on polarization of the P-wave arrivals. Besides these earthquakes, the OBS data recorded numerous seismic events of different types. They include: i) groups of very short and regularly spaced pulses that can be explained as acoustic calls generated by finback whales; ii) a large number of short-duration seismic events (2–3 s long) identified only at individual OBS; iii) local intense monochromatic signals lasting for up to 4 h that can be described as harmonic tremors. These last two types of seismic events might be related to hydrothermal activity within the uppermost sediments and deserve additional studies to appropriately establish the seismic hazard of this area.en_US
dc.language.isoengen_US
dc.publisherElsevieren_US
dc.rightsclosedAccessen_US
dc.subjectRegional seismicityen_US
dc.subjectGalicia Marginen_US
dc.subjectNW Iberiaen_US
dc.subjectOBS and land seismic networksen_US
dc.subjectLocal seismicityen_US
dc.subjectSeismic pulses and harmonic tremorsen_US
dc.titleSeismicity analysis at the Prestige oil-tanker wreck area (Galicia Margin, NW of Iberia)en_US
dc.typeartículoen_US
dc.identifier.doi10.1016/j.margeo.2007.09.015-
dc.description.peerreviewedPeer revieweden_US
dc.relation.publisherversionhttp://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6V6M-4R7RSD3-2&_user=145085&_rdoc=1&_fmt=&_orig=search&_sort=d&_docanchor=&view=c&_acct=C000012098&_version=1&_urlVersion=0&_userid=145085&md5=36c8c4f5cc073a26a005468388b3aaafen_US
Appears in Collections:(ICTJA) Artículos
Files in This Item:
There are no files associated with this item.
Show simple item record
 

Related articles:


WARNING: Items in Digital.CSIC are protected by copyright, with all rights reserved, unless otherwise indicated.