Developments in real-time radon monitoring at Stromboli volcano

We present the results of one year of continuous radon monitoring at Stromboli volcano collected at two automated real-time stations during 2008-2009. Multiple Linear Regression statistics (including the effects of tidal forces) led us to compute the residuals given by the difference of measured and calculated 222Rn concentrations. The cross-check between the daily measured radon activities and the absolute variations in radon residuals, for the data collected at the summit station, give us the opportunity to suggest a methodological approach that can be used in the attempt of predicting some major changes in volcanic activity.