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Normal vector analysis from GNSS-GPS data applied to Deception volcano surface deformation

2012-09Artigo científico Acesso aberto
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dc.contributor.authorBerrocoso, M.
dc.contributor.authorPrates, Gonçalo
dc.contributor.authorFernandez-Ros, A.
dc.contributor.authorGarcia, A.
dc.date.accessioned2018-12-07T14:58:13Z
dc.date.available2018-12-07T14:58:13Z
dc.date.issued2012-09
dc.description.abstractSurface deformation parameters and its use in volcano monitoring have evolved from classical geodetic procedures up to those based on Global Navigation Satellite Systems (GNSS), in particular the most widely used and known Global Positioning System (GPS), profiting from the automated data processing, positioning precision and rates, as well as the large storage capacity and low power consumption of its equipments. These features have enabled the permanent GNSSGPS data acquisition to ensure the continuous monitoring of geodetic benchmarks for the evaluation of surface deformation in active tectonic or volcanic areas. In Deception Island (Antarctica), a normal vector analysis is being used to give surface deformation based on three permanently observed GNSSGPS benchmarks. Due to data availability, both in the past and for near real-time use, all benchmarks used are inside the monitored volcanic area, although the reference is away from thermal springs and/or fumaroles, unlike the other two. The time variation of slope distances to the reference benchmark and of the magnitude and inclination of the normal vector to the triangle defined by the reference benchmark and any other two, provides the spatial deformation in the volcanic area covered. The normal vector variation in magnitude gives information on compression or expansion, here called spatial dilatometer, while the changes in inclination gives information on relative uplift or subsidence, here called spatial inclinometer. In geodesy, the triangle is a basic geometric unit and the areal strain is commonly applied in tectonics and volcanism. The normal vector analysis conjugates both, benefiting from the method's precision, simplicity and possibility to model the surface using several triangles. The proposed method was applied to GNSSGPS data collected every austral summer between 20012002 and 20092010 in Deception Island. The results evidence that Deception Island acts as a strain marker in the Bransfield Basin volcano-tectonic setting.
dc.description.sponsorshipSpanish Ministry of Education and Science as part of the National Antarctic Program; Recognition and fast evaluation of volcanic activity on Deception Island (GEODESY) [ANT1999-1430-E/HESP]; Geodetic Studies on Deception Island: deformation models, geoid determination and Scientific Information System [REN2000-0551-C03-01/ANT]; Acquisition of scientific software for GPS data processing [REN2000-2690-E]; Geodetic Control of the volcanic activity of Deception Island [CGL2004-21547-E/ANT]; Update of the Spanish Cartography for Deception Island [CGL2004-20408-E/ANT]; Volcanotectonic activity on Deception Island: geodetic, geophysical investigations and Remote Sensing on Deception Island and its surroundings [CGLl2005-07589-c03-01/ANT]; Geodetic and Geothermal Researches, Time Serial Analysis and Volcanic Innovation in Antarctica (South Shetland Islands and Antarctic Peninsula (GEOTINANT) [CTM2009-07251/ANT]
dc.description.versioninfo:eu-repo/semantics/publishedVersion
dc.identifier.doi10.1111/j.1365-246X.2012.05584.x
dc.identifier.issn0956-540X
dc.identifier.urihttp://hdl.handle.net/10400.1/11919
dc.language.isoeng
dc.peerreviewedyes
dc.publisherWiley-Blackwell
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
dc.subjectSouth-shetland islands
dc.subjectBransfield strait
dc.subjectAntarctic peninsula
dc.subjectTectonics
dc.subjectField
dc.titleNormal vector analysis from GNSS-GPS data applied to Deception volcano surface deformation
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage1570
oaire.citation.issue3
oaire.citation.startPage1562
oaire.citation.titleGeophysical Journal International
oaire.citation.volume190
person.familyNamePrates
person.givenNameGonçalo
person.identifierR-001-Y1J
person.identifier.ciencia-idFC15-AE46-CE93
person.identifier.orcid0000-0001-5797-9158
person.identifier.ridK-4018-2014
person.identifier.scopus-author-id6504498720
rcaap.rightsopenAccess
rcaap.typearticle
relation.isAuthorOfPublication286735d2-0aa5-447a-b90f-e7d2f217d652
relation.isAuthorOfPublication.latestForDiscovery286735d2-0aa5-447a-b90f-e7d2f217d652

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