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Astro*Dictionary by Michael Erlewine





1 article for "F-region"

F-region [ ]

Highest region of the ionosphere, at altitudes greater than 160 km (100 miles); it has the greatest concentration of free electrons and is the most important of the ionospheric regions. The charged particles in the F region consist primarily of neutral atoms split into electrons and charged atoms. Although its degree of ionization persists with little change through the night, there is a change in the ion distribution.

See also:
♦ Earth, Atmosphere of


Astro*Index Copyright © 1997 Michael Erlewine