The 2025 MW 8.8 Kamchatka Earthquake, Typical Precursors and Characteristics

Abstract The typicality of successful forecasting was shown for a set of anomalies described in detail earlier in a result of constructing and analyzing the generalized vicinity of a large earthquake, provided a sufficient number of weak events have been recorded in the source zone of an impending large earthquake. The presence of typical anomalies is shown for Kamchatka MW 8.8 earthquakes of 2025 and its large foreshocks and aftershocks. However, for the Kamchatka earthquake, the development of predicted anomalies is masked by the aftershock sequence of its large foreshock. Several features of the 2025 Kamchatka earthquake are noted. The area of the greatest slip for this event overlaps the source zone of the great earthquake of 1952, which raises the question of a possible deficit of displacements along the subduction zone accumulated from 1952 to 2025. Possible refinements of the earthquake prediction algorithm based on typical anomalies are discussed.