Amchitka (ămchĭtˈkə) [key], island, 40 mi (64 km) long, in the Rat group of the Aleutian Islands, W Alaska. It was a site in 1965 and 1971 for the underground detonation of nuclear devices, its small population having been relocated. In the 1990s, radiation from the test caves was detected at the surface.
The Columbia Electronic Encyclopedia, 6th ed. Copyright © 2012, Columbia University Press. All rights reserved.
More on Amchitka from Infoplease:
See more Encyclopedia articles on: U.S. Physical Geography