The regular monthly radon measurements were carried out in the fault zone on the Western slope of the Beshtau magmatic massif (North Caucasus). The radon exhalation rate from the soil surface, as well as radon concentrations in soil gas at a depth of 0.5 m and in groundwater discharged at a spring located nearby have simultaneously been measured. High seasonal fluctuations in radon exhalation and radon concentration in soil gas, characterized by highs in summer and lows in winter, were registered. In summer, the radon exhalation reached 23.8 Bq m⁻²s⁻¹, and the radon concentration in the soil gas reached 166 kBq m⁻³. In winter, both the radon exhalation and the radon concentration in the soil dropped to 0.025 Bq m⁻²s⁻¹ and <3 kBq m⁻³, respectively. The concentration of radon in ground water varied over the year in a relatively narrow range (100–210 Bq l⁻¹), and there were no seasonal fluctuations. A sharp increase in soil radon and radon exhalation in spring and a fall in autumn are timed to the moments when the temperature of the atmospheric air becomes, respectively, higher and lower than the temperature of the rock massif. Both the soil radon concentration and the radon exhalation show a close correlation with the temperature of atmospheric air, but in the first case the relationship is linear, and in the second – exponential. The obtained data confirm the assumption that the seasonal radon variations are caused by atmospheric air circulation in the shallow area of the fault due to the temperature difference between the atmosphere and the rock massif.

在Beshtau岩浆地块（北高加索地区）西坡的断层带进行定期的每月ra测量。同时测量了土壤中surface的呼出率，以及0.5 m深度的土壤气体中的and浓度和附近温泉中排出的地下水中的concentrations浓度。记录到seasonal气呼出和土壤气体中ra气浓度的季节性高波动，其特征是夏季高，冬季低。夏季，ex气呼出量达到23.8 Bq m ^-2 s ^-1，土壤气体中的concentration浓度达到166 kBq m ^-3。冬季，土壤中的ex析出和and浓度均下降至0.025 Bq m ^-2 s ^-1和<3 kBq m ^-3。一年中，地下水中ra的浓度在相对较小的范围内变化（100-210 Bq l ^-1），并且没有季节性波动。春季土壤soil的急剧增加和ra气的排出以及秋季的秋天的下降被定时到大气温度分别高于或低于岩体温度的时刻。土壤ra浓度和呼出气都与大气温度密切相关，但在第一种情况下，该关系是线性的，在第二种情况下是指数关系。所获得的数据证实了这样一种假设，即季节性ra变化是由于大气与岩石块之间的温差所致，在断层浅层中的大气循环引起的。