Shishaldin Volcano, or Mount Shishaldin, is a moderately active volcano on Unimak Island in the Aleutian Islands chain of Alaska in the United States. It is the highest mountain peak of the Aleutian Islands and rises about 10,000m from the bottom of the Aleutian Trench 140 miles south of the volcano. The volcano's topographic contour lines are nearly perfect circles above 6,500 feet (1,981 m). The lower north and south slopes are somewhat steeper than the lower eastern and western slopes. Only on the volcano's west flank between about 3500 to 6500 ft are small areas of rough topography which are remnants of an older collapsed volcano upon which Shishaldin is built. The volcano is the westernmost of three large stratovolcanoes along an east–west line in the eastern half of Unimak Island.
Mount Shishaldin, May 1994
An image of the volcano at sunset from 2005
A view of the volcano's 1999 eruption.
An overhead view of the volcano from November 24, 2013
Unimak Island is the largest island in the Aleutian Islands chain of the U.S. state of Alaska.
Unimak Island from space, September 1992 (viewed from Shuttle Endeavour on STS-47)
Cape Lutkes headland
Shishaldin, Isanotski and Roundtop volcanoes as seen from the Unimak Pass in morning light.
Pogramni (6,569 ft; 2,002 m) volcano as seen from the Unimak Pass in the morning light.