Report on Veniaminof (United States) — June 1995
Bulletin of the Global Volcanism Network, vol. 20, no. 6 (June 1995)
Managing Editor: Richard Wunderman
Veniaminof (United States) Small steam plume and hot spot on satellite imagery
Please cite this report as:
Global Volcanism Program, 1995. Report on Veniaminof (United States). In: Wunderman, R (ed.), Bulletin of the Global Volcanism Network, 20:6. Smithsonian Institution. http://dx.doi.org/10.5479/si.GVP.BGVN199506-312070.
56.17°N, 159.38°W; summit elev. 2507 m
All times are local (unless otherwise noted)
During 9-23 June, residents of Perryville, ~30 km S of Veniaminof, reported steam rising a few hundred meters over the summit. A hot spot was detected on AVHRR satellite images throughout this period. Poor weather prevented observation in late 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 reaches an elevation of 2156 m and 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: Alaska Volcano Observatory (AVO), a cooperative program of a) U.S. Geological Survey, 4200 University Drive, Anchorage, AK 99508-4667 USA, b) Geophysical Institute, University of Alaska, PO Box 757320, Fairbanks, AK 99775-7320, USA, and c) Alaska Division of Geological & Geophysical Surveys, 794 University Ave., Suite 200, Fairbanks, AK 99709, USA.