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ALASKA VOLCANO OBSERVATORY
Thursday, August 12, 2004 11:40 AM ADT (1940 UTC)
MOUNT SPURR VOLCANO (CAVW#1103-04)
61 deg 18' N 152 deg 15' W, Summit Elevation 11,070 ft (3,374 m)
Current Level of Concern Color Code: YELLOW
AVO received a pilot report at approximately 8:15 AM ADT, today, August 12,
2004, of possible emission of ash from Mt. Spurr volcano. At this time we
have no evidence that an eruption has occurred or is in progress. Crater
Peak, the vent responsible for the eruptions in 1953 and in the early
1990s, also shows no sign of any unusual activity.
Earthquake activity continues beneath Mt. Spurr with no significant change
over the past several weeks.
Based on these observations and our continuing seismic monitoring of the
volcano, there are no signs that an eruption is imminent or even certain.
Ephemeral summit craters have been described before at Mt. Spurr and
temporary increases in earthquake activity below a volcano often decline
without producing an eruption. AVO will continue to monitor activity at
Mount Spurr closely using seismic data, satellite images, and overflights,
and will issue further information releases as appropriate.
The volcano-hazard assessment for Mount Spurr Volcano is available from the
AVO web site: http://www.avo.alaska.edu/avo4/products/hazard.htm
ABBREVIATED COLOR CODE KEY (contact AVO for complete description):
GREEN` volcano is dormant; normal seismicity and fumarolic activity
YELLOW volcano is restless; eruption may occur
ORANGE volcano is in eruption or eruption may occur at any time
RED significant eruption is occurring or explosive eruption
expected at any time
VOLCANO INFORMATION ON THE INTERNET: http://www.avo.alaska.edu
RECORDING ON THE STATUS OF ALASKA'S VOLCANOES (907) 786-7478
Chris Waythomas, Acting Scientist-in-Charge, USGS
firstname.lastname@example.org; (907) 786-7497
Jeff Freymueller, Acting Coordinating Scientist, UAF-GI
email@example.com; (907) 474-7286
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.