Please use this identifier to cite or link to this item: http://hdl.handle.net/2122/4507
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dc.contributor.authorallEsposti Ongaro, T.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Pisa, Pisa, Italiaen
dc.contributor.authorallClarke, A. B.; Department of Geological Sciences, Arizona State University, Tempe, Arizona, USAen
dc.contributor.authorallNeri, A.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Pisa, Pisa, Italiaen
dc.contributor.authorallVoight, B.; Department of Geosciences, Pennsylvania State University, University Park, Pennsylvania, USAen
dc.contributor.authorallWidiwijayanti, C.; Department of Geosciences, Pennsylvania State University, University Park, Pennsylvania, USAen
dc.date.accessioned2008-12-09T09:10:32Zen
dc.date.available2008-12-09T09:10:32Zen
dc.date.issued2008-03-21en
dc.identifier.urihttp://hdl.handle.net/2122/4507en
dc.description.abstractDirected volcanic blasts are powerful explosions with a significant laterally directed component, which can generate devastating, high-energy pyroclastic density currents (PDCs). Such blasts are an important class of eruptive phenomena, but quantified understanding of their dynamics and effects is still incomplete. Here we use 2-D and 3-D multiparticle thermofluid dynamic flow codes to examine a powerful volcanic blast that occurred on Montserrat in December 1997. On the basis of the simulations, we divide the blast into three phases: an initial burst phase that lasts roughly 5 s and involves rapid expansion of the gas-pyroclast mixture, a gravitational collapse phase that occurs when the erupted material fails to mix with sufficient air to form a buoyant column and thus collapses asymmetrically, and a PDC phase that is dominated by motion parallel to the ground surface and is influenced by topography. We vary key input parameters such as total gas energy and total solid mass to understand their influence on simulations, and we compare the simulations with independent field observations of damage and deposits, demonstrating that the models generally capture important large-scale features of the natural phenomenon. We also examine the 2-D and 3-D model results to estimate the flow Mach number and conclude that the range of damage sustained at villages on Montserrat can be reasonably explained by the spatial and temporal distribution of the dynamic pressure associated with subsonic PDCs.en
dc.language.isoEnglishen
dc.publisher.nameAGUen
dc.relation.ispartofJournal of Geophysical Researchen
dc.relation.ispartofseries/113 (2008)en
dc.relation.isversionofhttp://hdl.handle.net/2122/3221en
dc.subjectSoufrière Hills Volcanoen
dc.subjectblast, multiphase flow modelsen
dc.subjectdynamic pressureen
dc.subjectpyroclastic density currentsen
dc.titleFluid dynamics of the 1997 Boxing Day volcanic blast on Montserrat, West Indiesen
dc.typearticleen
dc.description.statusPublisheden
dc.type.QualityControlPeer-revieweden
dc.description.pagenumberB03211en
dc.identifier.URLhttp://www.agu.org/journals/jb/jb0803/2006JB004898/2006JB004898.pdfen
dc.subject.INGV04. Solid Earth::04.08. Volcanology::04.08.99. General or miscellaneousen
dc.identifier.doi10.1029/2006JB004898en
dc.description.obiettivoSpecifico3.6. Fisica del vulcanismoen
dc.description.journalTypeJCR Journalen
dc.description.fulltextreserveden
dc.contributor.authorEsposti Ongaro, T.en
dc.contributor.authorClarke, A. B.en
dc.contributor.authorNeri, A.en
dc.contributor.authorVoight, B.en
dc.contributor.authorWidiwijayanti, C.en
dc.contributor.departmentIstituto Nazionale di Geofisica e Vulcanologia, Sezione Pisa, Pisa, Italiaen
dc.contributor.departmentIstituto Nazionale di Geofisica e Vulcanologia, Sezione Pisa, Pisa, Italiaen
dc.contributor.departmentDepartment of Geosciences, Pennsylvania State University, University Park, Pennsylvania, USAen
dc.contributor.departmentDepartment of Geosciences, Pennsylvania State University, University Park, Pennsylvania, USAen
item.openairetypearticle-
item.cerifentitytypePublications-
item.languageiso639-1en-
item.grantfulltextrestricted-
item.openairecristypehttp://purl.org/coar/resource_type/c_18cf-
item.fulltextWith Fulltext-
crisitem.author.deptIstituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Pisa, Pisa, Italia-
crisitem.author.deptArizona State University, USA-
crisitem.author.deptIstituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Pisa, Pisa, Italia-
crisitem.author.deptDepartment of Geosciences, Penn State University, University Park, Pennsylvania, USA-
crisitem.author.deptDepartment of Geosciences, Pennsylvania State University, University Park, Pennsylvania, USA-
crisitem.author.orcid0000-0002-6663-5311-
crisitem.author.orcid0000-0002-3536-3624-
crisitem.author.parentorgIstituto Nazionale di Geofisica e Vulcanologia-
crisitem.author.parentorgIstituto Nazionale di Geofisica e Vulcanologia-
crisitem.classification.parent04. Solid Earth-
crisitem.department.parentorgIstituto Nazionale di Geofisica e Vulcanologia-
crisitem.department.parentorgIstituto Nazionale di Geofisica e Vulcanologia-
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