Anatomy of the Bezymianny volcano merely before an explosive eruption on 20.12.2017

Abstract Strong explosive eruptions of volcanoes throw out mixtures of gases and ash from high-pressure underground reservoirs. Investigating these subsurface reservoirs may help to forecast and characterize an eruption. In this study, we compare seismic tomography results with remote sensing and pe...

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Autores principales:	Ivan Koulakov, Pavel Plechov, René Mania, Thomas R. Walter, Sergey Z. Smirnov, Ilyas Abkadyrov, Andrey Jakovlev, Vesta Davydova, Sergey Senyukov, Natalia Bushenkova, Angelika Novgorodova, Tatyana Stupina, Svetlana Ya. Droznina
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/f034f580430c4939b67249a5c3cca70d
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spelling	oai:doaj.org-article:f034f580430c4939b67249a5c3cca70d2021-12-02T15:23:38ZAnatomy of the Bezymianny volcano merely before an explosive eruption on 20.12.201710.1038/s41598-021-81498-92045-2322https://doaj.org/article/f034f580430c4939b67249a5c3cca70d2021-01-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-81498-9https://doaj.org/toc/2045-2322Abstract Strong explosive eruptions of volcanoes throw out mixtures of gases and ash from high-pressure underground reservoirs. Investigating these subsurface reservoirs may help to forecast and characterize an eruption. In this study, we compare seismic tomography results with remote sensing and petrology data to identify deep and subaerial manifestations of pre-eruptive processes at Bezymianny volcano in Kamchatka shortly before its violent explosion on December 20, 2017. Based on camera networks we identify precursory rockfalls, and based on satellite radar data we find pre-eruptive summit inflation. Our seismic network recorded the P and S wave data from over 500 local earthquakes used to invert for a 3D seismic velocity distribution beneath Bezymianny illuminating its eruptive state days before the eruption. The derived tomography model, in conjunction with the presence of the high-temperature-stable SiO2 polymorph Tridymite in juvenile rock samples , allowed us to infer the coexistence of magma and gas reservoirs revealed as anomalies of low (1.5) and high (2.0) Vp/Vs ratios, respectively, located at depths of 2–3 km and only 2 km apart. The reservoirs both control the current eruptive activity: while the magma reservoir is responsible for episodic dome growth and lava flow emplacements, the spatially separated gas reservoir may control short but powerful explosive eruptions of Bezymianny.Ivan KoulakovPavel PlechovRené ManiaThomas R. WalterSergey Z. SmirnovIlyas AbkadyrovAndrey JakovlevVesta DavydovaSergey SenyukovNatalia BushenkovaAngelika NovgorodovaTatyana StupinaSvetlana Ya. DrozninaNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-12 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Ivan Koulakov Pavel Plechov René Mania Thomas R. Walter Sergey Z. Smirnov Ilyas Abkadyrov Andrey Jakovlev Vesta Davydova Sergey Senyukov Natalia Bushenkova Angelika Novgorodova Tatyana Stupina Svetlana Ya. Droznina Anatomy of the Bezymianny volcano merely before an explosive eruption on 20.12.2017
description	Abstract Strong explosive eruptions of volcanoes throw out mixtures of gases and ash from high-pressure underground reservoirs. Investigating these subsurface reservoirs may help to forecast and characterize an eruption. In this study, we compare seismic tomography results with remote sensing and petrology data to identify deep and subaerial manifestations of pre-eruptive processes at Bezymianny volcano in Kamchatka shortly before its violent explosion on December 20, 2017. Based on camera networks we identify precursory rockfalls, and based on satellite radar data we find pre-eruptive summit inflation. Our seismic network recorded the P and S wave data from over 500 local earthquakes used to invert for a 3D seismic velocity distribution beneath Bezymianny illuminating its eruptive state days before the eruption. The derived tomography model, in conjunction with the presence of the high-temperature-stable SiO2 polymorph Tridymite in juvenile rock samples , allowed us to infer the coexistence of magma and gas reservoirs revealed as anomalies of low (1.5) and high (2.0) Vp/Vs ratios, respectively, located at depths of 2–3 km and only 2 km apart. The reservoirs both control the current eruptive activity: while the magma reservoir is responsible for episodic dome growth and lava flow emplacements, the spatially separated gas reservoir may control short but powerful explosive eruptions of Bezymianny.
format	article
author	Ivan Koulakov Pavel Plechov René Mania Thomas R. Walter Sergey Z. Smirnov Ilyas Abkadyrov Andrey Jakovlev Vesta Davydova Sergey Senyukov Natalia Bushenkova Angelika Novgorodova Tatyana Stupina Svetlana Ya. Droznina
author_facet	Ivan Koulakov Pavel Plechov René Mania Thomas R. Walter Sergey Z. Smirnov Ilyas Abkadyrov Andrey Jakovlev Vesta Davydova Sergey Senyukov Natalia Bushenkova Angelika Novgorodova Tatyana Stupina Svetlana Ya. Droznina
author_sort	Ivan Koulakov
title	Anatomy of the Bezymianny volcano merely before an explosive eruption on 20.12.2017
title_short	Anatomy of the Bezymianny volcano merely before an explosive eruption on 20.12.2017
title_full	Anatomy of the Bezymianny volcano merely before an explosive eruption on 20.12.2017
title_fullStr	Anatomy of the Bezymianny volcano merely before an explosive eruption on 20.12.2017
title_full_unstemmed	Anatomy of the Bezymianny volcano merely before an explosive eruption on 20.12.2017
title_sort	anatomy of the bezymianny volcano merely before an explosive eruption on 20.12.2017
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/f034f580430c4939b67249a5c3cca70d
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Anatomy of the Bezymianny volcano merely before an explosive eruption on 20.12.2017

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