February 26, 2026. On February 25, 2026, a scientific seminar of the Geophysical Center RAS was held online.

Alexander Yuryevich Motorin, a research scientist at the Kola Branch of the Geophysical Survey of RAS, presented a report titled "Assessment of Postseismic Activity in the Apatite-Nepheline Deposits of the Khibiny Massif" (based on his PhD thesis). The report was devoted to the study of aftershock processes of man-made earthquakes in the context of mining mineral deposits in the Khibiny massif. As the depth of mining increases, rock bursts and man-made earthquakes occur under the influence of increasing rock pressure. As in the case of tectonic seismicity, man-made earthquakes can initiate aftershocks, which pose an independent danger due to their proximity to mine workings weakened by the main shock.

The speaker presented the results of his dissertation study on the development of models of post-seismic activity at the Khibiny deposits and related techniques aimed at assessing the area of aftershock activity, the magnitude of the future strongest aftershock, and the duration of the period in which repeated tremors with a magnitude higher than the specified level are expected. The theoretical significance of the study lies in confirming the universality of the statistical laws of seismology, including the recently discovered law of delta productivity, regardless of the scale level and seismogenesis. The developed models and techniques are implemented in the Aftershock program, which is currently being used at a mining enterprise.