Lattice Boltzmann modeling to explain volcano acoustic source

Abstract Acoustic pressure is largely used to monitor explosive activity at volcanoes and has become one of the most promising technique to monitor volcanoes also at large scale. However, no clear relation between the fluid dynamics of explosive eruptions and the associated acoustic signals has yet...

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Autores principales:	Federico Brogi, Maurizio Ripepe, Costanza Bonadonna
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2018
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/2756e14e6ce84ef9a70a4f1a5db53a2c
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id	oai:doaj.org-article:2756e14e6ce84ef9a70a4f1a5db53a2c
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spelling	oai:doaj.org-article:2756e14e6ce84ef9a70a4f1a5db53a2c2021-12-02T15:08:14ZLattice Boltzmann modeling to explain volcano acoustic source10.1038/s41598-018-27387-02045-2322https://doaj.org/article/2756e14e6ce84ef9a70a4f1a5db53a2c2018-06-01T00:00:00Zhttps://doi.org/10.1038/s41598-018-27387-0https://doaj.org/toc/2045-2322Abstract Acoustic pressure is largely used to monitor explosive activity at volcanoes and has become one of the most promising technique to monitor volcanoes also at large scale. However, no clear relation between the fluid dynamics of explosive eruptions and the associated acoustic signals has yet been defined. Linear acoustic has been applied to derive source parameters in the case of strong explosive eruptions which are well-known to be driven by large overpressure of the magmatic fluids. Asymmetric acoustic waveforms are generally considered as the evidence for supersonic explosive dynamics also for small explosive regimes. We have used Lattice-Boltzmann modeling of the eruptive fluid dynamics to analyse the acoustic wavefield produced by different flow regimes. We demonstrate that acoustic waveform well reproduces the flow dynamics of a subsonic fluid injection related to discrete explosive events. Different volumetric flow rate, at low-Mach regimes, can explain both the observed symmetric and asymmetric waveform. Hence, asymmetric waveforms are not necessarily related to the shock/supersonic fluid dynamics of the source. As a result, we highlight an ambiguity in the general interpretation of volcano acoustic signals for the retrieval of key eruption source parameters, necessary for a reliable volcanic hazard assessment.Federico BrogiMaurizio RipepeCostanza BonadonnaNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 8, Iss 1, Pp 1-8 (2018)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Federico Brogi Maurizio Ripepe Costanza Bonadonna Lattice Boltzmann modeling to explain volcano acoustic source
description	Abstract Acoustic pressure is largely used to monitor explosive activity at volcanoes and has become one of the most promising technique to monitor volcanoes also at large scale. However, no clear relation between the fluid dynamics of explosive eruptions and the associated acoustic signals has yet been defined. Linear acoustic has been applied to derive source parameters in the case of strong explosive eruptions which are well-known to be driven by large overpressure of the magmatic fluids. Asymmetric acoustic waveforms are generally considered as the evidence for supersonic explosive dynamics also for small explosive regimes. We have used Lattice-Boltzmann modeling of the eruptive fluid dynamics to analyse the acoustic wavefield produced by different flow regimes. We demonstrate that acoustic waveform well reproduces the flow dynamics of a subsonic fluid injection related to discrete explosive events. Different volumetric flow rate, at low-Mach regimes, can explain both the observed symmetric and asymmetric waveform. Hence, asymmetric waveforms are not necessarily related to the shock/supersonic fluid dynamics of the source. As a result, we highlight an ambiguity in the general interpretation of volcano acoustic signals for the retrieval of key eruption source parameters, necessary for a reliable volcanic hazard assessment.
format	article
author	Federico Brogi Maurizio Ripepe Costanza Bonadonna
author_facet	Federico Brogi Maurizio Ripepe Costanza Bonadonna
author_sort	Federico Brogi
title	Lattice Boltzmann modeling to explain volcano acoustic source
title_short	Lattice Boltzmann modeling to explain volcano acoustic source
title_full	Lattice Boltzmann modeling to explain volcano acoustic source
title_fullStr	Lattice Boltzmann modeling to explain volcano acoustic source
title_full_unstemmed	Lattice Boltzmann modeling to explain volcano acoustic source
title_sort	lattice boltzmann modeling to explain volcano acoustic source
publisher	Nature Portfolio
publishDate	2018
url	https://doaj.org/article/2756e14e6ce84ef9a70a4f1a5db53a2c
work_keys_str_mv	AT federicobrogi latticeboltzmannmodelingtoexplainvolcanoacousticsource AT maurizioripepe latticeboltzmannmodelingtoexplainvolcanoacousticsource AT costanzabonadonna latticeboltzmannmodelingtoexplainvolcanoacousticsource
_version_	1718388173797588992

Lattice Boltzmann modeling to explain volcano acoustic source

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