Families of long-period earthquakes at the Young Shiveluch volcano (Russia) in 2022–2023

On April 10, 2023, the strongest eruption of the Young Shiveluch volcano ( Russia, Kamchatka Peninsula) in the last 60 years occurred. The eruption was preceded by a long seismic activity since the end of July 2022. Earthquakes during this period were mainly long-period, occurring in the area of the extruding extrusive dome. The paper describes the grouping of earthquakes into families according to the similarity of waveforms, and their comparison with the activity of the Young Shiveluch volcano. For the period of monotonic, with a constant rate, dome extrusion, when the pressure in the channel was constant, earthquakes were grouped into long-term families. The period before the culmination phase is characterized by a greater number of families, which is interpreted as an indicator of instability of the environment. Such an increase in the number of earthquake families allows us to predict more accurately the beginning of the culmintion phase of eruptions of andesitic Young Shiveluch volcano.