E region

E region

n.

See E layer.

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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 regionF region

Thesaurus

Noun

1.

E region - a region of the ionosphere (from 50 to 90 miles up) that reflects radio waves of medium length E layer, Heaviside layer, Kennelly-Heaviside layer ionosphere - the outer region of the Earth's atmosphere; contains a high concentration of free electrons