Alaska, United States
Pavlof Volcano is a stratovolcano of the Aleutian Range on the Alaska Peninsula. It has been one of the most active in the United States since 1980, with eruptions recorded in 1980, 1981, 1983, 1986–1988, 1996–1997, and an ongoing eruption starting on August 15, 2007 and ending on September 13. The Alaska Volcano Observatory currently rates Pavlof as Aviation Color Code Green and Volcano Alert Level Normal.. The mountain currently has basic real-time monitoring, but the USGS would like to improve instrumentation at the site.
The mountain shares a name with the nearby Pavlof Sister, which last erupted in 1786.
The first recorded ascent of Pavlof Volcano was on June 27, 1928 by T. A. Jagger, J. Gardiner, O. P. McKinley, P. A. Yatchmenoff, R. H. Stewart, although "speculation surrounds this ascent, which was recounted in National Geographic."
The main challenge of climbing this peak is its remoteness and the consequent difficulty of access. The peak is a 30 miles journey from the north side of Cold Bay. The climb itself is a straightforward snow climb, and the ski descent is recommended.
Since its last eruption in 1996, the volcano entered a period of dormancy, the longest it has ever been dormant since records of its eruptions have been kept. This period ended on August 15, 2007, with the start of a new eruption involving seismic disturbances and a "vigorous eruption of lava." The eruption ended on September 13, but activity may resume soon.