Pavlof and Pavlof Sister

Elevation: 8,264 feet (2,519 m)

Pavlof Sister:
Elevation: 7,028 feet (2,142 m)

More Information


Pavlof (55.42N, 161.90W) and Pavlof Sister (55.45N, 161.95W) are a pair of symmetrical stratovolcanoes on the Alaska Peninsula. Pavlof is probably the most consistently active volcano in the Aleutian arc, with nearly 40 eruptions since 1790. Eruptions are typically Strombolian. A 1928 expedition to Pavlof was directed by Dr. Thomas Jaggar, founder of the Hawaiian Volcano Observatory. Pavlof Sister is less active, with a single eruption from 1762-1786. In the above photograph Pavlof Sister is on the left and Pavlof on the right (date and photographer unknown).

Slightly dissected cone of Pavlof Sister. Photograph by U.S. Army Air Force, 1942. From Plate 2 in Kennedy and Waldron (1955).

Sources of Information:

Jaggar, T.A., 1929, Mapping the home of the great brown bear: Adventures of the National Geographic SocietyÕs Pavlof Volcano expedition to Alaska: National Geographic.

Kennedy, G.C., and Waldron, H.H., 1955, Geology of Pavlof and vicinity Alaska: U.S. Geological Survey Bulletin 1028-A, p. 1-18.

Simkin, T., and Siebert, L., 1994, Volcanoes of the World: Geoscience Press, Tucson, AZ, 349 p.

Wood, C.A., and Kienle, J., 1990, Volcanoes of North America: United States and Canada: Cambridge University Press, New York, NY, 354 p.


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United States