Research on variation of radon and gamma-background as a prediction of earthquakes in the Caucasus

For prediction of earthquakes in the Caucasus, a network of measurement sites for radon and gamma-background is established. The sites are established in the galleries of Krasnodar and Stavropol regions. The setups of measuring gamma-background and Rn in the soil air were built in galleries near settlement Kholmsky. The detector of Rn in soil operates in the gallery near Pyatigorsk. Gamma-setup is being mounted. Moreover, solid state nuclear track detectors (SSNTD) are operating in several points, including a mud volcano. They are exchanged every month. The preliminary data show correspondences between background radiation levels, and seismic and atmospheric phenomena.