Acoustic-electromagnetic radiation of the lithosphere

  1. Institute of Cosmophysical Researches and Radio Wave Propagation FEB RAS, Russia

   To determine the relation of lithosphere geoacoustic emission and its
   deformation-electromagnetic radiation, a synchronous registration of
   acoustic and electromagnetic signals was carried out in September, 2011 at
   Karymshina station, where the level of anthropogenic noise is quite low
   and the level of microseismic activity is high. Visual analysis of the
   obtained data showed, that for the biggest bursts in the acoustic channel
   the manifestation of magnetic field vertical component is observed in the
   signals, received from the quadruple and dipole sensors. But clear
   manifestation of acoustic emission was not detected by cross-correlation
   device due to big difference of signal structure in acoustic and
   electromagnetic channels. Thus, a method was developed, which is based on
   calculation of the number of electromagnetic signal extreme values
   occurrences in time neighborhood of acoustic channel extreme value. The
   strongest was the relation of quadruple and acoustic channels, for which
   the quadruple channel is 0.05 ms behind. The weaker was the relation
   between the acoustic emission and dipole channel electromagnetic
   radiation. This interaction appeared synchronously with acoustic, the
   acoustic emission was 0.2 ms behind the electromagnetic radiation.