ИСТИНА

Solar activity is one of the main factors determining the intensity of cosmic rays in Earth's orbit. Variations in the intensity of cosmic rays have been recorded by ground-based instruments for many decades, the most obvious of which is the eleven-year variation associated with the solar cycle. In this case, the degree of flux modulation decreases with increasing particle energy. The detector installed in Apatity, which monitors soft gamma radiation (20-600 keV) coming from the atmosphere, was launched in 2009. To date, data are available for the full cycle of solar activity. With the start of monitoring, a new effect was discovered: an increase in the flux of gamma quanta during precipitation. It was found that this effect is not associated with the presence of any radionuclides in the precipitation, but is a consequence of a change in the conditions for the interaction of secondary cosmic rays with the atmosphere. An analysis of the data set has been carried out and a search has been carried out for the possible influence of solar activity on this effect.