Observing eruptions of gas-rich compressible magmas from space

Kilbride, Brendan McCormick and Edmonds, Marie and Biggs, Juliet (2016) Observing eruptions of gas-rich compressible magmas from space. Nature Communications, 7. p. 13744. ISSN 2041-1723 DOI 10.1038/ncomms13744

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Official URL: http://doi.org/10.1038/ncomms13744

Abstract

Observations of volcanoes from space are a critical component of volcano monitoring, but we lack quantitative integrated models to interpret them. The atmospheric sulfur yields of eruptions are variable and not well correlated with eruption magnitude and for many eruptions the volume of erupted material is much greater than the subsurface volume change inferred from ground displacements. Up to now, these observations have been treated independently, but they are fundamentally linked. If magmas are vapour-saturated before eruption, bubbles cause the magma to become more compressible, resulting in muted ground displacements. The bubbles contain the sulfur-bearing vapour injected into the atmosphere during eruptions. Here we present a model that allows the inferred volume change of the reservoir and the sulfur mass loading to be predicted as a function of reservoir depth and the magma’s oxidation state and volatile content, which is consistent with the array of natural data.

Item Type: Article
Uncontrolled Keywords: 2016AREP; IA71
Subjects: 05 - Petrology - Igneous, Metamorphic and Volcanic Studies
Divisions: 05 - Petrology - Igneous, Metamorphic and Volcanic Studies
07 - Gold Open Access
Journal or Publication Title: Nature Communications
Volume: 7
Page Range: p. 13744
Identification Number: 10.1038/ncomms13744
Depositing User: Sarah Humbert
Date Deposited: 25 Jul 2017 15:17
Last Modified: 25 Jul 2017 15:20
URI: http://eprints.esc.cam.ac.uk/id/eprint/4001

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