Eruption dynamics of the 22-23 April 2015 Calbuco Volcano (Southern Chile): Analyses of tephra fall deposits

dc.creatorRomero Moyano, Jorge
dc.creatorMorgavi, Daniele
dc.creatorArzilli, Fabio
dc.creatorDaga, Romina Betiana
dc.creatorCaselli, Alberto Tomás
dc.creatorReckziegel, Florencia Mabel
dc.creatorViramonte, Jose German
dc.creatorDíaz Alvarado, Juan
dc.creatorPolacci, Margherita
dc.creatorBurton, Mike
dc.creatorPerugini, Diego
dc.date2016-05
dc.date.accessioned2023-08-30T16:32:44Z
dc.date.available2023-08-30T16:32:44Z
dc.identifierRomero, J. E., Morgavi, D., Arzilli, F., Daga, Romina Betiana., Caselli, Alberto Tomás and et al. (2016) Eruption dynamics of the 22-23 April 2015 Calbuco Volcano (Southern Chile): Analyses of tephra fall deposits. Elsevier Science; Journal of Volcanology and Geothermal Research; 317; 15-29
dc.identifier0377-0273
dc.identifierhttps://www.sciencedirect.com/science/article/pii/S037702731630004X?via%3Dihub#!
dc.identifierhttp://rid.unrn.edu.ar/handle/20.500.12049/5585
dc.identifierhttps://doi.org/10.1016/j.jvolgeores.2016.02.027
dc.identifier.urihttps://repositorioslatinoamericanos.uchile.cl/handle/2250/8531683
dc.descriptionFil: Romero, Jorge; Saltori. Universidad de Atacama; Chile
dc.descriptionFil: Morgavi, Daniele. Università di Perugia; Italia
dc.descriptionFil: Arzilli, Fabio. University of Manchester; Reino Unido
dc.descriptionFil: Daga, Romina Betiana. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina.
dc.descriptionFil: Caselli, Alberto Tomás. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina.
dc.descriptionFil: Reckziegel, Florencia Mabel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Salta. Instituto de Investigaciones en Energía no Convencional. Universidad Nacional de Salta. Facultad de Ciencias Exactas. Departamento de Física. Instituto de Investigaciones en Energía no Convencional; Argentina
dc.descriptionFil: Viramonte, Jose German. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Salta. Instituto de Investigaciones en Energía no Convencional. Universidad Nacional de Salta. Facultad de Ciencias Exactas. Departamento de Física. Instituto de Investigaciones en Energía no Convencional; Argentina
dc.descriptionFil: Díaz Alvarado, Juan. Universidad de Atacama; Chile
dc.descriptionFil: Polacci, Margherita. University of Manchester; Reino Unido
dc.descriptionFil: Burton, Mike. University of Manchester; Reino Unido
dc.descriptionFil: Perugini, Diego. Università di Perugia; Italia
dc.descriptionFil: Daga, Romina Betiana. Comisión Nacional de Energía Atómica. Centro Atómico Bariloche; Argentina
dc.descriptionFil: Caselli, Alberto Tomás. Universidad Nacional de Río Negro. Río Negro, Argentina
dc.descriptionAfter 54 years since its last major eruption in 1961, Calbuco Volcano (Ensenada, Southern Chile) reawakened with few hours of warning on 22 April 2015 at 18:05 local time. The main explosive eruption consisted of two eruption pulses (lasting ~1.5 and 6 h each one) on 22 and 23 April, producing stratospheric (>15 km height) eruption columns. The erupted materials correspond to porphyritic basaltic andesite (~55 wt.% of SiO2). The tephra fall affected mainly the area northeast of the volcano and the finest ash was deposited over Southern Chile and Patagonia Argentina. We studied the tephra fall deposits of both pulses in terms of stratigraphy, distribution, volume, emplacement dynamics and eruption source parameters. Here, we show field observations that have been made 5-470 km downwind and distinguish five layers (Layers A, B, B1, C and D) representing different stages of the eruption evolution: eruption onset (Layer A; pulse 1), followed by the first paroxysmal event (Layer B; pulse 1), in some places interbedded by layer B1, tentatively representing the sedimentation of a secondary plume during the end of pulse 1. We recognized a second paroxysm (Layer C; pulse 2) followed by the waning of the eruption (Layer D; pulse 2). The total calculated bulk tephra fall deposit volume is 0.27 ± 0.007 km3 (0.11-0.13 km3 dense rock equivalent), 38% of which was erupted during the first phase and 62% during the second pulse. This eruption was a magnitude 4.45 event (VEI 4 eruption) of subPlinian type.
dc.descriptiontrue
dc.description-
dc.formatapplication/pdf
dc.languageen
dc.publisherElsevier Science
dc.relation317
dc.relationJournal of Volcanology and Geothermal Research
dc.rightsinfo:eu-repo/semantics/openAccess
dc.rightshttps://creativecommons.org/licenses/by-nc-sa/4.0/
dc.subjectCiencias Exactas y Naturales
dc.subjectCalbuco Volcano
dc.subjectEruption Chronology
dc.subjectTephra Stratigraphy
dc.subjectSubPlinian Eruption
dc.subjectCiencias Exactas y Naturales
dc.titleEruption dynamics of the 22-23 April 2015 Calbuco Volcano (Southern Chile): Analyses of tephra fall deposits


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