E region

American  

noun

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

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E region British  

noun

1. Also called: Heaviside layer.   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 See also ionosphere

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E region Scientific  

1. 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.

2. Also called E layer Heaviside layer

3. Compare D region F region

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Etymology

Origin of E region

First recorded in 1935–40