|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|
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.