Printer friendly versionALASKA VOLCANO OBSERVATORY
Wednesday, September 7, 2005 5:00 PM AKDT (01:00 UTC)
VENIAMINOF VOLCANO CAVW#(1102-07-)
56.2 ° W 159.39 ° N, Summit Elevation 8225 ft (2507 m)
Current Level of Concern Color Code: YELLOW
Previous Level of Concern Color Code: GREEN
Several minor bursts of ash occurred at Veniaminof this afternoon as reported by Perryville residents, observed on an AVO Webcam, and recorded in seismic data. The bursts rose less than 9,000 ft ASL (only a few hundred feet above the active intracaldera cinder cone), and were confined to the caldera. There are no indications that more vigorous activity is imminent or even likely. We expect that steam and ash emissions similar to those observed today may continue intermittently and could pose a hazard to people and low-flying aircraft in the vicinity of the active cone.
AVO will continue to monitor activity at Mount Veniaminof using seismic data, satellite images, internet camera data and observer reports.
Mount Veniaminof volcano is a young stratovolcano with an ice-filled 10-km (6 mi) diameter summit caldera located on the Alaska Peninsula, 775 km (480 mi) southwest of Anchorage and 35 km (22 mi) north of Perryville. Veniaminof is one of the largest and most active volcanic centers in the Aleutian Arc and has erupted at least 12 times in the past 200 years. The most recent significant eruption of the volcano occurred in 1993-95 and was characterized by intermittent, low-level emissions of steam and ash, and a small lava flow onto the summit caldera ice field producing an ice pit. Previous historical eruptions have produced ash plumes that reached 6,000 m (20,000 ft) above sea level and associated ash fall within about 40 km (25 mi) of the volcano. Minor ash emissions similar to those occurring at present were also detected in mid 2004.
ABBREVIATED COLOR CODE KEY
(contact AVO for complete description):
volcano is dormant; normal seismicity and fumarolic activity occurring
volcano is restless; eruption may occur
volcano is in eruption or eruption may occur at any time
significant eruption is occurring or explosive eruption expected at any time
VOLCANO INFORMATION ON THE INTERNET:
RECORDING ON THE STATUS OF ALASKA'S VOLCANOES (907) 786-7478
Tom Murray, Scientist-in-Charge, USGS
firstname.lastname@example.org (907) 786-7497
John Eichelberger, Coordinating Scientist, UAF-GI
email@example.com; (907) 474-5530
The Alaska Volcano Observatory is a cooperative program of the U.S. Geological Survey, the University of Alaska Fairbanks Geophysical Institute, and the Alaska Division of Geological and Geophysical Surveys.