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Authors: Neri, M.*
Behncke, B.*
Burton, M.*
Galli, G.*
Giammanco, S.*
Pecora, E.*
Privitera, E.*
Reitano, D.*
Title: Continuous soil radon monitoring during the July 2006 Etna eruption
Series/Report no.: /33 (2006)
Publisher: AGU
Issue Date: 2006
DOI: 10.1029/2006GL028394
Keywords: NONE
Abstract: Continuous soil radon monitoring was carried out near the Southeast Crater (SEC) of Mt. Etna during the 10-day July 2006 Strombolian-effusive eruption. This signal was compared with simultaneously acquired volcanic tremor and thermal radiance data. The onset of explosive activity and a lava fountaining episode were preceded by some hours with increases in radon soil emission by 4–5 orders of magnitude, which we interpret as precursors. Minor changes in eruptive behavior did not produce significant variations in the monitored parameters. The remarkably high radon concentrations we observed are unprecedented in the literature. We interpret peaks in radon activity as due primarily to microfracturing of uranium-bearing rock. These observations suggest that radon measurements in the summit area of Etna are strongly controlled by the state of stress within the volcano and demonstrate the usefulness of radon data acquisition before and during eruptions.
Appears in Collections:Papers Published / Papers in press
04.08.07. Instruments and techniques
04.08.01. Gases
04.08.06. Volcano monitoring

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