Makushin Volcano

Makushin Volcano, or Mount Makushin, is an ice-covered stratovolcano on northern Unalaska Island and the island’s highest point. Its broad, dome-like shape and ice-capped upper slopes distinguish it from many Aleutian cones. Its volcanic history extends back to the early Pliocene, while the present summit caldera formed about 8,000 years ago after collapse. Repeated eruptions built lava flows, pyroclastic deposits, cones, and explosion pits across the surrounding landscape. One of Alaska’s most active volcanoes, it has erupted at least two dozen times in the past several thousand years, with recorded eruptions since the late eighteenth century and a last eruption on January 30, 1995.

Unalaska, Alaska · United States