Forecasting Effusive Dynamics and Decompression Rates by Magmastatic Model at Open-vent Volcanoes

Abstract Effusive eruptions at open-conduit volcanoes are interpreted as reactions to a disequilibrium induced by the increase in magma supply. By comparing four of the most recent effusive eruptions at Stromboli volcano (Italy), we show how the volumes of lava discharged during each eruption are li...

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Autores principales:	Maurizio Ripepe, Marco Pistolesi, Diego Coppola, Dario Delle Donne, Riccardo Genco, Giorgio Lacanna, Marco Laiolo, Emanuele Marchetti, Giacomo Ulivieri, Sébastien Valade
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/e96c4328f6b54f649390b2f555026fd1
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spelling	oai:doaj.org-article:e96c4328f6b54f649390b2f555026fd12021-12-02T12:32:01ZForecasting Effusive Dynamics and Decompression Rates by Magmastatic Model at Open-vent Volcanoes10.1038/s41598-017-03833-32045-2322https://doaj.org/article/e96c4328f6b54f649390b2f555026fd12017-06-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-03833-3https://doaj.org/toc/2045-2322Abstract Effusive eruptions at open-conduit volcanoes are interpreted as reactions to a disequilibrium induced by the increase in magma supply. By comparing four of the most recent effusive eruptions at Stromboli volcano (Italy), we show how the volumes of lava discharged during each eruption are linearly correlated to the topographic positions of the effusive vents. This correlation cannot be explained by an excess of pressure within a deep magma chamber and raises questions about the actual contributions of deep magma dynamics. We derive a general model based on the discharge of a shallow reservoir and the magmastatic crustal load above the vent, to explain the linear link. In addition, we show how the drastic transition from effusive to violent explosions can be related to different decompression rates. We suggest that a gravity-driven model can shed light on similar cases of lateral effusive eruptions in other volcanic systems and can provide evidence of the roles of slow decompression rates in triggering violent paroxysmal explosive eruptions, which occasionally punctuate the effusive phases at basaltic volcanoes.Maurizio RipepeMarco PistolesiDiego CoppolaDario Delle DonneRiccardo GencoGiorgio LacannaMarco LaioloEmanuele MarchettiGiacomo UlivieriSébastien ValadeNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-9 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Maurizio Ripepe Marco Pistolesi Diego Coppola Dario Delle Donne Riccardo Genco Giorgio Lacanna Marco Laiolo Emanuele Marchetti Giacomo Ulivieri Sébastien Valade Forecasting Effusive Dynamics and Decompression Rates by Magmastatic Model at Open-vent Volcanoes
description	Abstract Effusive eruptions at open-conduit volcanoes are interpreted as reactions to a disequilibrium induced by the increase in magma supply. By comparing four of the most recent effusive eruptions at Stromboli volcano (Italy), we show how the volumes of lava discharged during each eruption are linearly correlated to the topographic positions of the effusive vents. This correlation cannot be explained by an excess of pressure within a deep magma chamber and raises questions about the actual contributions of deep magma dynamics. We derive a general model based on the discharge of a shallow reservoir and the magmastatic crustal load above the vent, to explain the linear link. In addition, we show how the drastic transition from effusive to violent explosions can be related to different decompression rates. We suggest that a gravity-driven model can shed light on similar cases of lateral effusive eruptions in other volcanic systems and can provide evidence of the roles of slow decompression rates in triggering violent paroxysmal explosive eruptions, which occasionally punctuate the effusive phases at basaltic volcanoes.
format	article
author	Maurizio Ripepe Marco Pistolesi Diego Coppola Dario Delle Donne Riccardo Genco Giorgio Lacanna Marco Laiolo Emanuele Marchetti Giacomo Ulivieri Sébastien Valade
author_facet	Maurizio Ripepe Marco Pistolesi Diego Coppola Dario Delle Donne Riccardo Genco Giorgio Lacanna Marco Laiolo Emanuele Marchetti Giacomo Ulivieri Sébastien Valade
author_sort	Maurizio Ripepe
title	Forecasting Effusive Dynamics and Decompression Rates by Magmastatic Model at Open-vent Volcanoes
title_short	Forecasting Effusive Dynamics and Decompression Rates by Magmastatic Model at Open-vent Volcanoes
title_full	Forecasting Effusive Dynamics and Decompression Rates by Magmastatic Model at Open-vent Volcanoes
title_fullStr	Forecasting Effusive Dynamics and Decompression Rates by Magmastatic Model at Open-vent Volcanoes
title_full_unstemmed	Forecasting Effusive Dynamics and Decompression Rates by Magmastatic Model at Open-vent Volcanoes
title_sort	forecasting effusive dynamics and decompression rates by magmastatic model at open-vent volcanoes
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/e96c4328f6b54f649390b2f555026fd1
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Forecasting Effusive Dynamics and Decompression Rates by Magmastatic Model at Open-vent Volcanoes

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