Seguam Island

Seguam Island (Aleut: Saĝuugamax;[1] Russian: Остров Сигуам) is a small volcanic island in the Andreanof Islands group in the Aleutian Islands of Alaska. The island is mountainous and oval shaped with a land area of 80.04 square miles (207.3 km2). It is 16 miles (26 km) long and 6.8 miles (10.9 km) wide. The 2000 census reported a population of one person.

Seguam Island
Highest point
Elevation3,458 ft (1,054 m)
Coordinates52°19′24″N 172°27′58″W / 52.32333°N 172.46611°W / 52.32333; -172.46611Coordinates: 52°19′24″N 172°27′58″W / 52.32333°N 172.46611°W / 52.32333; -172.46611
LocationAleutian Islands, Alaska, US
Topo mapUSGS Seguam
Mountain typeStratovolcanoes
Last eruptionMay to August 1993

The island consists of several overlapping stratovolcanoes, and it contains two calderas each with central volcanic cones. About 10 historical eruptions have been recorded since the late 18th century, the most recent in 1993. All recent activity has occurred at Pyre Peak, the cone within the western caldera and the highest point on the island, and has produced explosive eruptions and basaltic lava flows.


  1. ^ Bergsland, K. (1994). Aleut Dictionary. Fairbanks: Alaska Native Language Center.

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