"E layer." YourDictionary, n.d. Web. 14 January 2019. <https://www.yourdictionary.com/e-layer>.
E layer. (n.d.). Retrieved January 14th, 2019, from https://www.yourdictionary.com/e-layer
A region of the ionosphere, extending from about 90 to 150 kilometers (55 to 95 miles) above the earth and influencing long-distance communications by strongly reflecting radio waves in the range from one to three megahertz. Also called E region . Also called Heaviside layer . Also called Kennelly-Heaviside layer .