Propagation of electromagnetic fields from seismic sources into the upper ionosphere

Details Propagation of electromagnetic fields from seismic sources into the upper ionosphere Propagation of electromagnetic fields from seismic sources into the upper ionosphere

Feb 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991ge%26ae..31..111m&link_type=abstract

Geomagnetizm i Aeronomiia (ISSN 0016-7940), vol. 31, Jan.-Feb. 1991, p. 111-119. In Russian.

Physics

5

Electromagnetic Fields, Nonuniform Plasmas, Oblique Shock Waves, Seismic Waves, Upper Ionosphere, Wave Propagation, Earth Magnetosphere, Magnetic Field Configurations, Magnetohydrodynamic Waves, Propagation Modes, Seismic Energy

Scientific paper

A theoretical analysis indicates that the propagation of wideband electromagnetic radiation from a seismic source through the earth's surface, the lower atmosphere, and the ionosphere leads to the excitation of oblique Alfven waves in the 0.3-10 Hz range in the upper ionosphere and magnetosphere. The propagation efficiency is greater for a magnetic-type source than for an electric-type source, and increases with decreasing conductivity of the earth. The excitation zone is circular with a radius of 100-150 km.

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