Ionospheric mechanism for the two maxima in the spatial distribution of Pc3 geomagnetic pulsations

Details Ionospheric mechanism for the two maxima in the spatial distribution of Pc3 geomagnetic pulsations Ionospheric mechanism for the two maxima in the spatial distribution of Pc3 geomagnetic pulsations

Jul 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993jatp...55.1281n&link_type=abstract

Journal of Atmospheric and Terrestrial Physics (ISSN 0021-9169), vol. 55, no. 9, p. 1281-1288.

Physics

1

Electron Precipitation, Geomagnetic Pulsations, Interplanetary Magnetic Fields, Ionospheric Currents, Solar Wind Velocity, Earth Surface, Equatorial Regions, Polar Caps, Spatial Distribution

Scientific paper

A modeling of the spatial distribution of Pc3 geomagnetic pulsations on the earth's surface is carried out. We propose that the main contribution to the PC3 amplitude is due to ionospheric currents fluctuating because of conductivity variations associated with the modulation of electron precipitations which occurs in the field of compressional waves coming, probably, from the solar wind. A coincidence of the two dayside maxima in Pc3 geomagnetic pulsation amplitude with two maxima in electron precipitations is in favor of such a proposition.

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