It is generally accepted but not experimentally proven that a quantitative prediction of volcanic eruptions is possible from the evaluation of volcanic gas data. By discussing the results of two years of real-time observation of H2O, CO2 and SO2 in volcanic gases from Mt. Etna volcano, we unambiguously demonstrate that increasing CO2/SO2 ratios can allow detecting the pre-eruptive degassing of uprising magmas. Quantitative modeling by the use of a saturation model allows us to relate the pre-eruptive increases of the CO2/SO2 ratio to the refilling of Etna’s shallow conduits with CO2-rich deep-reservoir magmas, leading to pressurization and eruption triggering. The advent of real-time observations of H2O, CO2 and SO2, combined with well-constrained models of degassing, represents a step forward in eruption forecasting.Keywords: Mount Etna, volcanoes, degassing, volatiles, gas plumes, volcanogenic processes.
|Numero di pagine||4|
|Stato di pubblicazione||Published - 2007|
All Science Journal Classification (ASJC) codes
Valenza, M., Aiuppa, A., Giudice, G., Liuzzo, M., Federico, C., Aiuppa, A., Papale, P., Gurrieri, S., Moretti, R., & Shinohara, H. (2007). Forecasting Etnean eruptions by real-time observations of volcanic gas composition. Geology, 35, 1115-1118.