Features of geoacoustic signal flow azimuthal distribution in the conditions of deformation process variability in the near-surface rocks

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   The results of long-term investigation of geoacoustic emission directional
   properties, carried out by a vector receiver in Kamchatka seismically
   active zone, are presented. Peculiarities of geoacoustic signal azimuthal
   distribution during weak (background) deformations are considered.
   Emission properties during deformation activity, including the periods of
   seismic process preparation, are investigated. The paper summarizes the
   results of several tens of cases.