Report on Veniaminof (United States) — May 1994
Bulletin of the Global Volcanism Network, vol. 19, no. 5 (May 1994)
Managing Editor: Richard Wunderman
Veniaminof (United States) Occasional steam plumes seen during breaks in the weather
Please cite this report as:
Global Volcanism Program, 1994. Report on Veniaminof (United States). In: Wunderman, R (ed.), Bulletin of the Global Volcanism Network, 19:5. Smithsonian Institution. http://dx.doi.org/10.5479/si.GVP.BGVN199405-312070.
56.17°N, 159.38°W; summit elev. 2507 m
All times are local (unless otherwise noted)
Residents in Perryville . . . reported a large steam plume rising from Veniaminof on the afternoon of 20 May. Inclement weather prevented observation of any other activity during the second half of May. Residents of Port Heiden . . . who were able to see the volcano on 2 June reported that no plume was present over the summit caldera. However, they did observe a steam plume on 9 June. AVO received no pilot reports of continuing eruptive activity in early June.
Geologic Background. Massive Veniaminof volcano, one of the highest and largest volcanoes on the Alaska Peninsula, is truncated by a steep-walled, 8 x 11 km, glacier-filled caldera that formed around 3700 years ago. The caldera rim is up to 520 m high on the north, is deeply notched on the west by Cone Glacier, and is covered by an ice sheet on the south. Post-caldera vents are located along a NW-SE zone bisecting the caldera that extends 55 km from near the Bering Sea coast, across the caldera, and down the Pacific flank. Historical eruptions probably all originated from the westernmost and most prominent of two intra-caldera cones, which rises about 300 m above the surrounding icefield. The other cone is larger, and has a summit crater or caldera that may reach 2.5 km in diameter, but is more subdued and barely rises above the glacier surface.
Information Contacts: AVO.