Open-File Report 00-519
Aniakchak is an active volcano located on the Alaska Peninsula 670 kilometers southwest of Anchorage. The volcano consists of a dramatic, 10-kilometer-diameter, 0.5 to 1.0-kilometer-deep caldera that formed during a catastrophic eruption 3,500 years ago. Since then, at least a dozen separate vents within the caldera have erupted, often explosively, to produce lava flows and widespread tephra (ash) deposits. The most recent eruption at Aniakchak occurred in 1931 and was one of the largest explosive eruptions in Alaska in the last 100 years. Although Aniakchak volcano presently shows no signs of unrest, explosive and nonexplosive eruptions will occur in the future. Awareness of the hazards posed by future eruptions is a key factor in minimizing impact.
First posted May 15, 2001
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Neal, Christina A.; McGimsey, Robert G.; Miller, Thomas P.; Riehle, James R.; Waythomas, Christopher F., 2000, Preliminary Volcano-Hazard Assessment for Aniakchak Volcano, Alaska: U.S. Geological Survey Open-File Report 00-519, 42 pp., https://pubs.usgs.gov/of/2000/0519/.
Summary of volcano hazards at Aniakchak volcano
Location of Aniakchak volcano
Prehistoric eruptive activity at Aniakchak volcano
Historical eruptions at Aniakchak volcano
Volcano hazards at Aniakchak
Could another caldera-forming eruption occur at Aniakchak?
Event frequency and risk at Aniakchak volcano
Volcano monitoring and eruption response at Aniakchak
Preparing for eruptions at Aniakchak volcano