Fisher Caldera

Unimak Island
Alaska
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View of part of the interior of Fisher caldera on Unimak Island in the eastern Aleutian Islands.
Photo: Alaska Volcano Observatory Copyleft: Some Rights Reserved

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Fisher caldera is 11 km wide by 18 km long. It is one of at least three volcanoes on Unimak Island that have been active in historical time, with the most recent activity recorded in August of 1830.
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