E region

the region of the ionosphere in which the E layer forms.


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World English Dictionary
E region or E layer
See also ionosphere Heaviside layer, Also called: Kennelly-Heaviside layer a region of the ionosphere, extending from a height of 90 to about 150 kilometres. It reflects radio waves of medium wavelength
E layer or E layer

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American Heritage
Science Dictionary
E region  
The region of the ionosphere that lies approximately 90 to 150 km (56 to 93 mi) above the Earth's surface. This region may affect long-distance communications because it influences radio waves in the 1-3 megahertz range. Also called E layer, Heaviside layer. Compare D region, F region.

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