In-soil radon anomalies as precursors of earthquakes: a case study in the SE slope of Mt. Etna in a period of quite stable weather conditions

► Clear correlation between in-soil radon anomalies and the principal earthquakes. ► Weather stability, earthquakes within the Dobrovolsky radius and close to the site. ► Clear correlation between in-soil radon fluctuations and climatic parameters. ► Satisfactory results of the statistical and quantitative methods adopted.