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Acoustic-electromagnetic radiation of the lithosphere
- 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.