The Aleutian Arc is a large volcanic arc of islands extending from the Southwest tip of the U.S. state of Alaska to the Kamchatka Peninsula of the Russian Federation.
Diagram showing the process of subduction and the formation of volcanic arcs.
Image showing the Aleutian Island Arc, along with the trench. The trench is denoted by the dark blue line to the south running parallel with the island arc. The area between the trench and the ridge delineates the blocks of crust that cause much of the seismic activity in the region.
The Alaska Peninsula is a peninsula extending about 497 mi (800 km) to the southwest from the mainland of Alaska and ending in the Aleutian Islands. The peninsula separates the Pacific Ocean from Bristol Bay, an arm of the Bering Sea.
Peulik Volcano and cottongrass meadow
Springtime hiker near Chiginagak Volcano in May 2007.
Peulik Volcano and Ukinrek Maars.
Gorge in Valley of Ten Thousand Smokes.