Alaska alone contains some 130 active volcanoes, with most situated along the Aleutian Islands. This is mostly caused by the subduction of the Pacific Plate beneath the North American Plate.

It's home to the largest active volcano on Earth ... The vast majority are located in the Aleutian Islands, the Alaska Peninsula, the Hawaiian Islands and the Cascade Range of the Pacific Northwest.

The quakes on Sunday did not appear related to recent seismic activity at a volcano ... including the Aleutian Islands is on the Ring of Fire, a seismically and volcanically active zone that ...