. English: Shishaldin Volcano (left) and Mt. Isanotski, Unimak Island, ca. 1912 . English: Caption on image: Shishaldon Volcano, Alaska. Mt. Isanotsky PH Coll The Shishaldin Volcano is one of the most active volcanoes in the Aleutian arc. It has erupted at least 29 times since 1775. The cone has a base diameter of approximately 10 miles (16 km). The most recent eruptive period occurred in April-May 1999. Mt. Isanotski is a stratovolcano, also known as 'Ragged Jack' for its rugged and jagged features, that is located on Unimak Island in the Aleutian island chain. It has not erupted sinc
. English: Shishaldin Volcano (left) and Mt. Isanotski, Unimak Island, ca. 1912 . English: Caption on image: Shishaldon Volcano, Alaska. Mt. Isanotsky PH Coll The Shishaldin Volcano is one of the most active volcanoes in the Aleutian arc. It has erupted at least 29 times since 1775. The cone has a base diameter of approximately 10 miles (16 km). The most recent eruptive period occurred in April-May 1999. Mt. Isanotski is a stratovolcano, also known as 'Ragged Jack' for its rugged and jagged features, that is located on Unimak Island in the Aleutian island chain. It has not erupted since the 1840s. Subjects (LCTGM): Shishaldin Volcano (Alaska); Isanotski Volcano (Alaska); Volcanoes--Alaska; Unimak Island (Alaska) . circa 1912 74 Shishaldin Volcano (left) and Mt Isanotski, Unimak Island, ca 1912 (THWAITES 216)
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Photo credit: © The Picture Art Collection / Alamy / Afripics
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