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Amchitka

(Encyclopedia) AmchitkaAmchitkaămchĭtˈkə [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…

Unimak

(Encyclopedia) UnimakUnimak&oomacr;ˈnĭmăk, y&oomacr;ˈ– [key], volcanic island, 70 mi (113 km) long, off W Alaska. It is the largest of the Aleutian Islands, and nearest to the Alaska…

Jaggar,Thomas Augustus, Jr.

(Encyclopedia) Jaggar,Thomas Augustus, Jr., 1871–1953, American geologist and volcanologist, b. Philadelphia, Ph.D. Harvard, 1897. One of the team of U.S. scientists (1902) who surveyed the eruptions…

Bogoslof Island

(Encyclopedia) Bogoslof IslandBogoslof Islandbōˈgəslôf [key], volcanic islet, c.1.2 mi (.75 km) long, SW Alaska, Aleutian Islands, in the Bering Sea, 61 mi (98 km) NW of Unalaska. The island first…

Umnak

(Encyclopedia) UmnakUmnak&oomacr;mˈnăk [key], island, c.83 mi (134 km) long, off SW Alaska, one of the largest of the Aleutian Islands. Its two lobes, connected by an isthmus, are marked by…

Okmok

(Encyclopedia) Okmok, shield volcano on Umnak, SW Alaska, in the Aleutian Islands. Rising to 3,520 ft (1,073 m) and extending over most of NE Umnak, the 22-mi-wide (35-km) volcano contains two 6-mi-…

Unalaska

(Encyclopedia) UnalaskaUnalaskaŭnˌəlăsˈkə, &oomacr;ˌnə– [key], rugged island, 30 mi (48 km) long, off SW Alaska, one of the largest Aleutian Islands. Visited (c.1759) by Russian explorers, the…

Oceania

(Encyclopedia) OceaniaOceaniaōshēănˈēə, –āˈnēə [key] or OceanicaOceanicaōshēănˈĭkə [key], collective name for the approximately 25,000 islands of the Pacific, usually excluding such nontropical areas…

Aleutian Range

(Encyclopedia) Aleutian Range, volcanic mountain chain, c.1,600 mi (2,600 km) long, SW Alaska, extending W from Anchorage along the Alaska Peninsula, and continuing, partly submerged as the Aleutian…

Alaska Peninsula

(Encyclopedia) Alaska Peninsula, SW Alaska, extending 500 mi (800 km) SW from the mainland, separating Bristol Bay and the Bering Sea from Cook Inlet, the Shelikof Strait, and Pacific Ocean. The…