Nature
Mount Gareloi, a stratovolcano on uninhabited Gareloi Island in Alaska’s Aleutian Islands, forms most of the island and is the northernmost volcano of the Delarof Group. Built through multiple eruptive episodes of lava and pyroclastic material, it has two summit craters, evidence of an older caldera, and a long but incompletely understood eruptive history. Recorded eruptions extend back to at least 1760 and were usually modest to moderate, though the 1929 eruption was notably complex. Improved monitoring began in 2003. Despite its isolation, Gareloi is a significant hazard because ash clouds can threaten aircraft and volcanic flows or avalanches could reach the sea and affect protected wildlife.
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Adak, Alaska · United States
