The Aleutian Arc is a volcanic arc located in the northern Pacific Ocean, extending from Alaska to Russia. It is formed by the subduction of the Pacific Plate beneath the North American Plate, creating a chain of active volcanoes. The Aleutian Arc is a prime example of an island arc system and is significant for studying subduction-related volcanic activity, plate tectonics, and associated seismic hazards.
Reference: https://www.usgs.gov/publications/geologic-framework-aleutian-arc-alaska.