File:Diurnal ionospheric current.jpg

Summary

Schematic diagram of the electric-current pattern in the ionosphere driven by diurnal heating from the Sun. Note that the current is concentrated on the day side, consisting of two oppositely oriented circuits.

Source: http://geomag.usgs.gov/intro.html  ; original upload english wikipedia 14 March 2005 by SEWilco en:Image:Diurnal ionospheric current.jpg

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