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The Aleutian Islands extend more than 1,200 miles from mainland Alaska toward Russia, forming a dramatic volcanic arc between the Bering Sea and the Pacific Ocean. Created by tectonic subduction where the Pacific Plate dives beneath the North American Plate, this region is one of the most geologically active in North America. Frequent earthquakes, active volcanoes, and powerful North Pacific storms define life along this remote chain. The islands also serve as a crucial ecological bridge between