Physics – Plasma Physics
Scientific paper
May 1998
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998jgr...103.9441a&link_type=abstract
Journal of Geophysical Research, Volume 103, Issue A5, p. 9441-9448
Physics
Plasma Physics
6
Ionosphere: Plasma Waves And Instabilities, Meteorology And Atmospheric Dynamics: Waves And Tides, Space Plasma Physics: Kinetic And Mhd Theory, Space Plasma Physics: Waves And Instabilities
Scientific paper
A new mechanism of transformation of long-wavelength acoustic waves into electromagnetic in partially ionized plasmas is suggested. The range of geomagnetic pulsation frequencies has been studied. It is shown that in collective motion acoustic wave involves the charged particles of media by means of the collisions. Relative motion of charged particles excites the alternating current with arbitrary phase, and consequently, the parametric generation of electromagnetic fields occurs. The growth rates, excitement thresholds, spectra, and polarization of electromagnetic disturbances are determined. The suggested mechanism not only has generalphysical importance, but it can also explain the observed data and the prediction of expected character of atmospheric waveprocesses before the earthquake.
Aburjania George D.
Machabeli George Z.
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