Dome-like behaviour at Mt. Etna: the case of the 28 December 2014 South East Crater paroxysm

C. Ferlito, V. Bruno, G. Salerno*, T. Caltabiano, D. Scandura, M. Mattia, M. Coltorti

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)
19 Downloads (Pure)

Abstract

On the 28 December 2014, a violent and short paroxysmal eruption occurred at the South East Crater (SEC) of Mount Etna that led to the formation of huge niches on the SW and NE flanks of the SEC edifice from which a volume of ∼3 × 106 m3 of lava was erupted. Two basaltic lava flows discharged at a rate of ∼370 m3/s, reaching a maximum distance of ∼5 km. The seismicity during the event was scarce and the eruption was not preceded by any notable ground deformation, which instead was dramatic during and immediately after the event. The SO2 flux associated with the eruption was relatively low and even decreased few days before. Observations suggest that the paroxysm was not related to the ascent of volatile-rich fresh magma from a deep reservoir (dyke intrusion), but instead to a collapse of a portion of SEC, similar to what happens on exogenous andesitic domes. The sudden and fast discharge eventually triggered a depressurization in the shallow volcano plumbing system that drew up fresh magma from depth. Integration of data and observations has allowed to formulate a novel interpretation of mechanism leading volcanic activity at Mt. Etna and on basaltic volcanoes worldwide.

Original languageEnglish
Article number5361
Pages (from-to)1-12
Number of pages12
JournalScientific Reports
Volume7
DOIs
Publication statusPublished - 2017
Externally publishedYes

Bibliographical note

Copyright the Author(s) 2017. Version archived for private and non-commercial use with the permission of the author/s and according to publisher conditions. For further rights please contact the publisher.

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