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Please use this identifier to cite or link to this item: http://hdl.handle.net/2122/5110

Authors: Zanon, V.*
Neri, M.*
Pecora, E.*
Title: Interpretation of data from the monitoring thermal camera of Stromboli volcano (Aeolian Islands, Italy)
Other Titles: FLIR thermal monitoring camera, Stromboli
Title of journal: Geological Magazine
Series/Report no.: 4/146 (2009)
Publisher: Cambridge University Press
Issue Date: Jul-2009
DOI: 10.1017/S0016756809005937
URL: http://journals.cambridge.org/action/displayIssue?jid=GEO&volumeId=146&issueId=04
Keywords: explosive dynamic
thermal video monitoring
volcano-tectonic structures
volcano collapses
Stromboli
Abstract: Twenty eruptive events from the Northeast Crater of Stromboli volcano recorded by a thermal monitoring camera in early 2004 were analysed in order to understand the eruptive dynamics. Selected eventswere chosen to be typical of explosions that characterize the steady activity of Stromboli in terms of jet height and duration. Most of the explosions consisted of clast-rich single bursts, originating from the same vent inside the Northeast Crater. Conspicuous ash emission was scarce. Eruptions were preceded by the flashing of a perturbation wave characterized by low temperatures and an average propagation velocity of about 35–100 m s−1. This perturbation was thought to be caused by the bursting of the gas slug at the bottom of the crater and is interpreted as an air wave. This was immediately followed by the expansion of a jet of ‘hot’ gas and particles, at a velocity of 35–75 m s−1. Ejecta coarser than 138 cm appeared ∼1.6–2 s after the onset of the explosion, moving at a variable velocity (30–60 m s−1). Eruptive events were either vertical or inclined 7–13◦ towards the NNW. This inclination is thought to be a consequence either of the morphology of the conduit, following modest rock falls that partially obstructed the uppermost part of the crater, or of the displacement of the internal conduit due to the explosive activity of the volcano. The instability of the summit area is a further possible cause of the deformation of the conduit.
Appears in Collections:Papers Published / Papers in press
04.04.99. General or miscellaneous
04.04.11. Instruments and techniques
04.07.99. General or miscellaneous
04.07.05. Stress
04.07.07. Tectonics
04.07.08. Volcanic arcs
04.08.99. General or miscellaneous
04.08.01. Gases
04.08.02. Experimental volcanism
04.08.03. Magmas
04.08.04. Thermodynamics
04.08.06. Volcano monitoring
04.08.07. Instruments and techniques
04.08.08. Volcanic risk
05.02.99. General or miscellaneous
05.02.03. Volcanic eruptions
05.08.99. General or miscellaneous

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