Peculiarities of the Seismic Activation of Avacha Volcano in Late 2019

Seismic activation of Avacha volcano was observed from late October to late December 2019, when six swarm sequences of volcanic earthquakes of various types occurred in its edifice. In the swarm sequences, 15 plane-oriented clusters were identified, and the characteristics of their seismogenic areas were determined. A comprehensive analysis of seismic events indicates that the activation of Avacha volcano at the end of 2019 occurred because of the interaction of meteoric waters with magma bodies, which formed during the effusive eruption of 1991 within the volcanic edifice.