Ivanof Bay 22 mi (35 km) SE Perryville 35 mi (56 km) NE Sand Point 43 mi (70 km) SW Nelson Lagoon 45 mi (73 km) NW Anchorage 516 mi (831 km) NE
This volcano is a member of the Stepovak Bay group. From Wood and Kienle (1990) : "The Stepovak Bay group is a chain of five volcanoes at the southwest end of a N40 degrees E oriented linear segment of the Aleutian arc on the Alaska Peninsula. This same segment includes the better known Veniaminof and Aniakchak calderas. Three of the Stepovak Bay volcanoes [2, 4, and Kupreanof] have clearly had Holocene eruptions, resulting in three small debris flows filling late Pleistocene glacial valleys, and a small cinder cone and associated lava flow. The other two volcanoes (1 and 3) do not show unmistakable evidence of Holocene activity. They have ice-filled summit craters 500 m (1) and 300 m (3) in diameter that may be late Pleistocene age. These volcanoes have contributed to extensive late Tertiary and Quaternarylava flows, some extending near sea level."