Results of investigation of the relation between geoacoustic emission and atmospheric electric field in Kamchatka

Marapulets Yu.V.1, Rulenko O.P.1, 2, Mishchenko M.A.1, Larionov I.A.1
  1. Institute of Cosmophysical Researches and Radio Wave Propagation FEB RAS, Russia
  2. Institute of Vulcanology and Seismology FEB RAS, Russia

   Results of joint investigation of geoacoustic emission and atmospheric
   electric field by the ground surface, which have been carried out in
   Kamchatka since 2005, are presented. It has been discovered for the first
   time, that during calm weather conditions (no rain, strong or moderate
   wind, low atmospheric pressure) simultaneous disturbances of these
   geophysical fields are sometimes observed. They are manifested in the form
   of bay-like decreases of electric field gradient potential up to the
   change of sign, which appear during sharp and considerable increase of
   acoustic pressure in kilohertz frequency range. Applying non-parametric
   methods for correlation analysis and according to the data of two
   summer-autumn experiments, highly significant feedback coupling between
   mean hour values of geoacoustic emission and of electric field was
   statistically determined. Up-to-date geoacoustic, atmospheric-electric and
   deformation measurements has shown that different in sign anomalous
   disturbances of emission and electric field occur when near surface
   sedimentary rock deformation velocity is increased during tension.
   Possible mechanism of appearance of the determined relation is considered.