The following Master Thesis has been performed as part of the European project ArtEmis, whose main goal is to investigate the possibility of using the increased concentration of the radioactive gas radon as an earthquake precursor. Among the natural disasters, earthquakes are particularly frequent and cause thousands of deaths whenever they hit with a large magnitude. Their high mortality is mainly due to their unpredictability in space and time, even though areas with a higher seismic activity can be identified based on geological studies and statistical records. Before an earthquake, microcracks are formed in the surrounding stone structures due to stress, releasing greater than usual amounts of radon gas within the rock pores.