Аннотация:According to the long-term earthquake statistic and the data of monitoring of water
inflows carried out at the apatite-nepheline deposits of the Khibiny massif, the authors have
revealed a statistically significant decrease in the .b-values of the Gutenberg-Richter law during
the period of high watering (May–October) compared with the period of low watering
(November–April). A sharp increase in seismicity (.a-value of the Gutenberg-Richter law) with
the beginning of the watering increase in the deposits of the Khibiny massif caused by the
melting of snow accumulated over the winter is demonstrated. A decrease in the strength of
rocks and the dilatancy of cracks due to the influence of additional pore pressure can serve as an
explanation for the dependence of the seismic regime on the change in the level of watering of
the rocks.