Physics
Scientific paper
Jan 2003
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003georl..30b..29c&link_type=abstract
Geophysical Research Letters, Volume 30, Issue 2, pp. 29-1, CiteID 1057, DOI 10.1029/2002GL015463
Physics
12
Geochemistry: Isotopic Composition/Chemistry, Volcanology: Eruption Monitoring (7280), Volcanology: Magma Migration, Volcanology: Physics And Chemistry Of Magma Bodies
Scientific paper
Five years of gas monitoring from selected sites suggest that Mt Etna's plumbing system is much more extensive than previously reported. It extends at least 40 km SW from the volcano's boundary along the NE-SW regional fault, where it discharges about 200 tons/day of gas, containing helium with mantle-type isotopic composition. Synchronous variations of 3He/4He isotopic ratios in gas sampled at sites located 60 kilometers apart have allowed us to detect pulses of ascending magma in the plumbing system, thus providing a powerful tool for eruption forecasting. Following summer 2001 eruption, the still increasing trend of the 3He/4He ratios indicates that magma storage is even now occurring at a shallow depth. Hence, the volcano maintains a high capacity to re-erupt within the next few months.
Caracausi Antonio
Favara Rocco
Giammanco Salvatore
Italiano Francesco
Nuccio Pasquale M.
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