Simultaneous effusive and explosive cinder cone eruptions at Veniaminof Volcano, Alaska

Historical eruptions of Veniaminof Volcano, Alaska have all occurred at a 300-m-high cinder cone within the icefilled caldera that characterizes the volcano. At least six of nineteen historical eruptions involved simultaneous explosive and effusive activity from separate vents. Eruptions in 1944, 19...

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Autor principal:	Christopher Waythomas
Formato:	article
Lenguaje:	EN
Publicado:	Volcanica 2021
Materias:	veniaminof volcano cinder cone eruptions conduit network Geology QE1-996.5
Acceso en línea:	https://doaj.org/article/5703f7d8046e49f0bcdddf46b69ace81
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id	oai:doaj.org-article:5703f7d8046e49f0bcdddf46b69ace81
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spelling	oai:doaj.org-article:5703f7d8046e49f0bcdddf46b69ace812021-12-01T16:40:43ZSimultaneous effusive and explosive cinder cone eruptions at Veniaminof Volcano, Alaska2610-354010.30909/vol.04.02.295307https://doaj.org/article/5703f7d8046e49f0bcdddf46b69ace812021-12-01T00:00:00Zhttps://www.jvolcanica.org/ojs/index.php/volcanica/article/view/100https://doaj.org/toc/2610-3540Historical eruptions of Veniaminof Volcano, Alaska have all occurred at a 300-m-high cinder cone within the icefilled caldera that characterizes the volcano. At least six of nineteen historical eruptions involved simultaneous explosive and effusive activity from separate vents. Eruptions in 1944, 1983–1984, 1993–1994, 2013, 2018 and 2021 included periods of explosive ash-producing Strombolian activity from summit vents and simultaneous nonexplosive effusion of lava from flank vents on either the southern or northeast sides of the cone. A T-junction conduit network is proposed to explain the simultaneous eruptive styles and as a mechanism for gas-magma segregation that must occur to produce the observed activity. Historical eruptions with simultaneous summit and flank activity produced slightly higher rising ash clouds compared to historical eruptions where simultaneous activity did not occur. This could be a consequence of the partitioning of more gas-charged magma into the vertical conduit of a T-junction conduit system.Christopher WaythomasVolcanicaarticleveniaminof volcanocinder cone eruptionsconduit networkGeologyQE1-996.5ENVolcanica, Vol 4, Iss 2, Pp 295-307 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	veniaminof volcano cinder cone eruptions conduit network Geology QE1-996.5
spellingShingle	veniaminof volcano cinder cone eruptions conduit network Geology QE1-996.5 Christopher Waythomas Simultaneous effusive and explosive cinder cone eruptions at Veniaminof Volcano, Alaska
description	Historical eruptions of Veniaminof Volcano, Alaska have all occurred at a 300-m-high cinder cone within the icefilled caldera that characterizes the volcano. At least six of nineteen historical eruptions involved simultaneous explosive and effusive activity from separate vents. Eruptions in 1944, 1983–1984, 1993–1994, 2013, 2018 and 2021 included periods of explosive ash-producing Strombolian activity from summit vents and simultaneous nonexplosive effusion of lava from flank vents on either the southern or northeast sides of the cone. A T-junction conduit network is proposed to explain the simultaneous eruptive styles and as a mechanism for gas-magma segregation that must occur to produce the observed activity. Historical eruptions with simultaneous summit and flank activity produced slightly higher rising ash clouds compared to historical eruptions where simultaneous activity did not occur. This could be a consequence of the partitioning of more gas-charged magma into the vertical conduit of a T-junction conduit system.
format	article
author	Christopher Waythomas
author_facet	Christopher Waythomas
author_sort	Christopher Waythomas
title	Simultaneous effusive and explosive cinder cone eruptions at Veniaminof Volcano, Alaska
title_short	Simultaneous effusive and explosive cinder cone eruptions at Veniaminof Volcano, Alaska
title_full	Simultaneous effusive and explosive cinder cone eruptions at Veniaminof Volcano, Alaska
title_fullStr	Simultaneous effusive and explosive cinder cone eruptions at Veniaminof Volcano, Alaska
title_full_unstemmed	Simultaneous effusive and explosive cinder cone eruptions at Veniaminof Volcano, Alaska
title_sort	simultaneous effusive and explosive cinder cone eruptions at veniaminof volcano, alaska
publisher	Volcanica
publishDate	2021
url	https://doaj.org/article/5703f7d8046e49f0bcdddf46b69ace81
work_keys_str_mv	AT christopherwaythomas simultaneouseffusiveandexplosivecinderconeeruptionsatveniaminofvolcanoalaska
_version_	1718404750993522688

Simultaneous effusive and explosive cinder cone eruptions at Veniaminof Volcano, Alaska

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