The deepest anomaly, located in the center of the Kluchevskoy
group below 25 km depth, is robustly resolved in all time periods and
is seen in all horizontal and vertical sections representing the real data
results (Figs. 5 to 7 and A2 to A4), except for the time windows prior
to the year 2000, when the data volume and quality was insufficient.
Within this anomaly, we observe positive P- and very strong negative
S-velocity anomalies, leading to unusually high Vp/Vs values, up to 2.2.
In the upper part of this anomaly, there are dense clusters of seismicity
that release most of the seismic energy in the study area