Report on Pavlof (United States) — April 1977
Natural Science Event Bulletin, vol. 2, no. 4 (April 1977)
Managing Editor: David Squires.
Pavlof (United States) Ashfall darkens snow near the summit on 22 March
Please cite this report as:
Global Volcanism Program, 1977. Report on Pavlof (United States) (Squires, D., ed.). Natural Science Event Bulletin, 2:4. Smithsonian Institution. https://doi.org/10.5479/si.GVP.NSEB197704-312030
55.417°N, 161.894°W; summit elev. 2493 m
All times are local (unless otherwise noted)
22 March, 1915: light "smoke" plume. Ash darkened the top 100 m of the cone; 2305: steaming.
Geological Summary. The most active volcano of the Aleutian arc, Pavlof is a Holocene stratovolcano that was constructed along a line of vents extending NE from the Emmons Lake caldera. Pavlof and Pavlof Sister to the NE form a dramatic pair of symmetrical, glacier-covered stratovolcanoes that overlook Pavlof and Volcano bays. Little Pavlof is a smaller cone on the SW flank of Pavlof volcano, near the rim of Emmons Lake caldera. Unlike Pavlof Sister, eruptions have frequently been reported from Pavlof, typically Strombolian to Vulcanian explosive eruptions from the summit vents and occasional lava flows. The active vents lie near the summit on the north and east sides. The largest recorded eruption took place in 1911, at the end of a 5-year-long eruptive episode, when a fissure opened on the N flank, ejecting large blocks and issuing lava flows.
Information Contacts: R. Dean, USAF, Cold Bay.