F region

English

Alternative forms

• F-region

Etymology

(This etymology is missing or incomplete. Please add to it, or discuss it at the Etymology scriptorium.)

Proper noun

the F region

1. The middle layer of the ionosphere, located 90 km (56 mi) to 150 km (93 mi) above the surface of the Earth.

Synonyms

• F layer

Further reading

• F region on Wikipedia.Wikipedia