Observations on the stress related variations of soil radon concentration in the Gulf of Corinth, Greece.

Our observations indicate a characteristic pattern in the long-term variation of soil radon concentrations, which seems to be consistent with the expected variation of regional stress in relation to seismicity. However, it seems that the major changes in radon level begin before the rock rapture, i.e.

In-situ radionuclide characterization of a submarine groundwater discharge site at Kalogria Bay, Stoupa, Greece.

In-situ underwater gamma-ray spectrometer KATERINA was used for continuous measurements of radon progenies ((214)Pb, (214)Bi), thoron progeny ((208)Tl) and (40)K in submarine groundwater discharge (SGD) sites at Kalogria Bay, SW Peloponnesus (Greece). The spectrometer was deployed attached on measuring platform along with two conductivity - temperature data loggers while underwater battery packs supplied the system for acquisition periods up to 25 days. The radionuclide time series together with salinity data were obtained for spring (wet) and summer (dry) seasons.