Ivanof Bay 20 mi (32 km) SE Perryville 33 mi (53 km) SE Sand Point 45 mi (73 km) SW Nelson Lagoon 47 mi (75 km) NW Anchorage 515 mi (828 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 Quaternary lava flows, some extending near sea level."