The relationship between radon gas and earthquake behavior is widely researched by investigating 222Rn (Radon-222) in air,
soil, and water. This study is aimed at proving that 222Rn concentration in rain water and in the movement of rain systems will
give an indication of impending earthquakes. The study was conducted in predetermined areas in the west of Anatolia. It is
found that 222Rn in rain water was between 0.021 and 0.647 Bq/l for a year in Bornova. Besides, it is shown that the origin
of air masses that affect the area are covered in this study and synoptic and climatologic analysis of these air masses as well
as thunderstorms and strokes are presented in this study. It is found from the analysis that the information of earthquake is
transported by the presence of radon gas with rain water in the predetermined area, approximately a radius of 97 km area.