# A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
Astro*Dictionary by Michael Erlewine





1 article for "E-region"

E-region - [ ]

Also called Kennelly-Heaviside Layer, ionospheric region that generally extends from an altitude of 90 km (60 miles) to about 160 km (100 miles). As in the D-region (70–90 km), the ionization is primarily molecular, resulting from the splitting of neutral molecules –oxygen (O2) and nitrogen (N2)– into electrons and positively charged molecules. Unlike that of the D-region, the ionization of the E-region remains at night, though it is considerably diminished.

See also:
♦ Earth, Atmosphere of


Astro*Index Copyright © 1997 Michael Erlewine