Printer friendly versionALASKA VOLCANO OBSERVATORY
Wednesday, January 18, 2006 5:55 PM AKST (255 UTC)
59.3633°N 153.4333°W, Summit Elevation 4134 ft (1260 m)
Current Level of Concern Color Code: ORANGE
Earthquake activity at Augustine Volcano has remained at lower levels throughout the day but the level of seismic activity is still above background. Based on the characteristics of previous eruptions, it is likely, but not certain, that more explosive eruptions will occur. These events are likely to be similar to those of January 13, 14, and 17 and it is possible for them to occur with little or no warning. AVO is monitoring the situation closely and the observatory is staffed 24/7.
Observations made on a flight during the afternoon of January 18 indicated that that the summit was steaming vigorously, so much so that it was not possible to determine if a new dome had been emplaced. Evidence of explosive ejection of volcanic bombs producing large truck sized circular craters was observed on the northwest flank. Block and ash flow deposits with car-sized blocks produced by dome collapse covered parts of the southeast flank and dilute ash cloud surge deposits were observed on the northwest flank. A white steam plume was observed rising to about 8500 ft (2600 m) before it trailed off as a bluish haze to the east. Little to no ash appeared to be present in the plume.
ABBREVIATED COLOR CODE KEY
(contact AVO for complete description):
GREEN volcano is dormant; normal seismicity and fumarolic activity occurring
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
Tom Murray, Scientist-in-Charge, USGS
firstname.lastname@example.org (907) 786-7497
Steve McNutt, Acting Coordinating Scientist, UAF-GI
email@example.com (907) 474-7131 OR (907) 474-7274
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.