Forecast of volcanic eruptions by chemical methods
1975
From the magmatic emanations differentiation point of view it is possible to calculate some ratios such as F/CO2, Cl/CO2, SO2/CO2, SO2/H2S, H2S/CO2 and CO2/N2 in the tumarolic gases for the forecasting of volcanic activity. In order to predict the cruptions of a volcano it is needed to select several fumaroles or hot springs having different regimes of variation of the above ratios. The study of some fumaroles composition at the Asama. Mihara, Kirishima and other volcanoes in Japan showed a close connection between volcanic gas compositions and state of the volcanoes.
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