Ukinrek Maars, Volcanic crater system in Lake and Peninsula Borough, Alaska
The Ukinrek Maars consists of two volcanic craters, with the eastern crater measuring 300 meters in diameter and the western one spanning 170 meters.
The formation of these volcanic craters occurred during a ten-day eruption in March and April 1977, marking the first recorded volcanic activity in this location.
The name Ukinrek derives from the local Indigenous language, meaning Two Holes, directly referencing the geological formation of the dual crater system.
The volcanic site includes a 49-meter-high lava dome within the eastern crater lake, which researchers monitor for ongoing geological activity.
The eruption produced approximately 26 million cubic meters of tephra and 900,000 cubic meters of lava, creating distinct layers in the surrounding landscape.
Location: Lake and Peninsula Borough
Elevation above the sea: 91 m
GPS coordinates: 57.83170,-156.51000
Latest update: March 3, 2025 00:10
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