Eruptive sequence and seismic activity of Llaima volcano (Chile) during the 2007 2009 eruptive period: Inferences of the magmatic feeding system

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datacite.alternateIdentifier.citationJournal of Volcanology and Geothermal Research, 379, 105-90, 2019
datacite.alternateIdentifier.doi10.1016/j.jvolgeores.2019.04.014
datacite.alternateIdentifier.issn0377-0273
datacite.creatorFranco-Marin, Luis Enrique
datacite.creatorPalma, José Luis
datacite.creatorLara, Luis E.
datacite.creatorGil-Cruz, Fernando
datacite.creatorCardona, Carlos
datacite.creatorBasualto, Daniel
datacite.creatorSan Martín, Juan
datacite.date2019
datacite.rightsRegistro bibliográfico
datacite.subjectFractures
datacite.subjectHawaiian And Strombolian Styles
datacite.subjectLlaima Volcano
datacite.subjectOpen Conduit System
datacite.subjectVolcano Seismicity
datacite.subjectFracture
datacite.subjectVolcanoes
datacite.subjectConduit Systems
datacite.subjectExplosive Activity
datacite.subjectHawaiian And Strombolian Styles
datacite.subjectMonitoring Network
datacite.subjectMorphological Changes
datacite.subjectVolcanic Explosivity Indices
datacite.subjectVolcano-seismicity
datacite.subjectWaveform Cross Correlation
datacite.subjectEarthquakes
datacite.subjectFracture
datacite.subjectMagma
datacite.subjectMagmatism
datacite.subjectMicrotremor
datacite.subjectPetrology
datacite.subjectSeismicity
datacite.subjectVolcanic Eruption
datacite.subjectWaveform Analysis
datacite.subjectAraucania
datacite.subjectLlaima
datacite.subjectSouthern Volcanic Zone
datacite.titleEruptive sequence and seismic activity of Llaima volcano (Chile) during the 2007 2009 eruptive period: Inferences of the magmatic feeding system
dc.description.abstractLlaima Volcano, one of the most active volcanoes in South America, has experienced intense activity during the last 100 years. The most recent eruptive activity occurred during the period 2007 2009 with at least six energetic eruptions, the January 1st 2008 (VEI 3) being the strongest episode. Most of the paroxysmal activity was characterized by a rapid increase in seismic energy (minutes to hours) and the absence of precursory signals, as well as by an accelerated drop of the seismic energy and eruption intensity at the end. Moreover, subtle changes in the increase of low-energy long-period (LP) seismicity and the occurrence of minor explosive activity (six months before the onset of the eruptive cycle), were the only remarkable changes observed in advance. This is the first study that includes a detailed description of the 2007 2009 eruptive period and is based on a temporal analysis of the seismic records, technical reports from the monitoring network and >2000 photos. This set allows a characterization of the coeval eruptive styles (including strombolian and hawaiian activity), morphological changes of the active vents inside the main crater and two fractures located in the SW and SE flanks. Ten phases were identified based on the eruptive style, Volcanic Explosivity Index (VEI) and the salient features of the seismic events. The seismicity that accompanied the eruptive phases was characterized by the predominance of a continuous tremor (TR) and discrete LP events, and a remarkable absence of volcano-tectonics (VT) earthquakes. A waveform cross-correlation analysis of LP events showed an overall low similarity between them, which suggests multiple sources. Our observations and analysis suggest that the plumbing system is composed of multiple independent structures, some of which reached the surface during this eruptive period, indicating that the upper part of the cone could be an unstable and essentially weak zone. The activity and seismicity observed are characteristic of an open-vent system in which the magma can ascend rapidly from several km depth, with little to no clear precursory activity. These results are in agreement with petrological studies of the products of these eruptions. © 2019 Elsevier B.V., All rights reserved.
dc.description.ia_keyworderuptive, activity, period, seismic, during, volcano, most
dc.identifier.urihttps://repositoriodigital.uct.cl/handle/10925/3878
dc.language.isoen
dc.publisherElsevier BV
dc.relationinstname: ANID
dc.relationreponame: Repositorio Digital RI2.0
dc.rights.driverinfo:eu-repo/semantics/openAccess
dc.sourceJournal of Volcanology and Geothermal Research
dc.subject.ia_odsODS 7: Energía asequible y no contaminante
dc.subject.ia_oecd1nCiencias Naturales
dc.subject.ia_oecd2nCiencias Físicas
dc.subject.ia_oecd3nCiencias de la Tierra y Medioambientales
dc.type.driverinfo:eu-repo/semantics/article
dc.type.driverhttp://purl.org/coar/resource_type/c_2df8fbb1
dc.type.openaireinfo:eu-repo/semantics/publishedVersion
dspace.entity.typePublication
oaire.citationEdition2019
oaire.citationEndPage105
oaire.citationStartPage90
oaire.citationTitleJournal of Volcanology and Geothermal Research
oaire.citationVolume379
oaire.fundingReferenceOVDAS RNVV SERNAGEOMIN
oaire.fundingReferenceANID FONDECYT 1151175
oaire.fundingReferenceANID FONDAP 15110017
oaire.fundingReferenceUdeC Beca Doctorado
oaire.licenseConditionCopyright © Elsevier Ltd, 2019
oaire.resourceTypeArtículo de revisión
oaire.resourceType.enReview
uct.catalogadorjvu
uct.comunidadIngenieríaen_US
uct.departamentoDepartamento de Obras Civiles y Geología
uct.facultadFacultad de Ingeniería
uct.indizacionScience Citation Index Expanded - SCIE
uct.indizacionScopus
uct.indizacionGeoRef
uct.indizacionCurrent Contents/Physical, Chemical and Earth Sciences
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