Augustine Volcano is a stratovolcano in Alaska consisting of a central complex of summit lava domes and flows surrounded by an apron of pyroclastic, lahar, avalanche, and ash deposits. One of the most restless volcanoes in the region, this stunning 4,134-foot cone forms its own five-mile-diameter island in Cook Inlet about 70 miles west of Homer and 170 miles southwest of Anchorage. It has erupted nine times since the 1930s, most recently in 2005-6, with several explosions and a big lava floe down its northern flank.