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dc.contributor.authorCole, Paul
dc.contributor.authorStinton, AJ
dc.contributor.authorOdbert, HM
dc.contributor.authorBonadonna, C
dc.contributor.authorStewart, RC
dc.date.accessioned2016-05-11T13:42:04Z
dc.date.available2016-05-11T13:42:04Z
dc.date.issued2015-05
dc.identifier.issn0016-7649
dc.identifier.issn2041-479X
dc.identifier.urihttp://hdl.handle.net/10026.1/4609
dc.description.abstract

Vulcanian explosions generate some of the most hazardous types of volcanic phenomena, including pyroclastic density currents. Non-vertical directionality of an explosion promotes asymmetrical distribution of proximal hazards around the volcano. Although critical, such behaviour is relatively uncommon and has been seldom documented. Here we present, for the first time, evidence both from geophysical monitoring and field survey data that records the occurrence of such an event. Thermal imagery captures a Vulcanian explosion at Soufrière Hills Volcano, Montserrat, which occurred during a large partial lava dome collapse in February 2010, and was inclined at about 25° from the vertical in a northerly direction. Pyroclastic products were preferentially distributed to the north and included: an unusual pumice boulder deposit that we propose was formed by a dilute pyroclastic density current; pumice flow deposits; and a proximal lapilli and block fallout lobe. The inclined nature of the explosion is attributed to the asymmetric geometry around the vent. The explosion-derived pyroclastic density currents had notably lower velocities than those associated with lateral blasts, which, we suggest, result from a separate and distinct mechanism. These inclined explosions present an additional mechanism that is able to generate directed pyroclastic density currents, with consequent implications for hazard assessment.

dc.format.extent287-293
dc.languageen
dc.language.isoen
dc.publisherGeological Society of London
dc.titleAn inclined Vulcanian explosion and associated products
dc.typejournal-article
dc.typeJournal Article
plymouth.author-urlhttps://www.webofscience.com/api/gateway?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000353722600003&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=11bb513d99f797142bcfeffcc58ea008
plymouth.issue3
plymouth.volume172
plymouth.publication-statusPublished
plymouth.journalJournal of the Geological Society
dc.identifier.doi10.1144/jgs2014-099
plymouth.organisational-group/Plymouth
plymouth.organisational-group/Plymouth/Faculty of Science and Engineering
plymouth.organisational-group/Plymouth/Faculty of Science and Engineering/School of Geography, Earth and Environmental Sciences
plymouth.organisational-group/Plymouth/REF 2021 Researchers by UoA
plymouth.organisational-group/Plymouth/REF 2021 Researchers by UoA/UoA07 Earth Systems and Environmental Sciences
plymouth.organisational-group/Plymouth/Users by role
plymouth.organisational-group/Plymouth/Users by role/Academics
dc.identifier.eissn2041-479X
dc.rights.embargoperiodNot known
rioxxterms.versionofrecord10.1144/jgs2014-099
rioxxterms.licenseref.urihttp://www.rioxx.net/licenses/all-rights-reserved
rioxxterms.typeJournal Article/Review
plymouth.oa-locationhttp://jgs.lyellcollection.org/content/172/3/287.full.pdf+html


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