Printer friendly versionALASKA VOLCANO OBSERVATORY
Thursday, February 16, 2006 2:05 PM AKST (2305 UTC)
59°21'48"N 153°26'W , Summit Elevation 4134 ft (1260 m)
Current Level of Concern Color Code: ORANGE
Clear satellite views of Augustine this morning showed a strong thermal anomaly in the summit crater area. AVO seismometers continue to record rock falls and small pyroclastic flow signals indicative of occasional, minor collapses of the lava dome. Over the past week, the number of these events has steadily declined, suggesting that the rate of lava effusion may be slowing. An AVO observation and airborne gas measurement flight is en route to the volcano this afternoon.
We have no evidence of ash emission from Augustine since the overflight on Monday, February 13. However, a low plume composed of variable amounts of gas, steam, and small amounts of ash is likely being emitted intermittently from Augustine's summit. Occasional, very localized ash clouds are likely to be produced by collapses from the lava dome.
It is still possible for brief, energetic explosions to occur with little or no warning. Such explosions could produce larger amounts of ash leading to the formation of drifting ash clouds that could rise more than 25,000 feet above sea level.
Based on all available data, AVO believes that dome building eruptive activity will continue over the next few days or weeks and may continue intermittently over the next several months. As soon as weather and logistics allow, AVO scientists will be visiting the island to download data, conduct maintenance, and begin geologic studies of eruptive deposits.
AVO is monitoring the situation closely and the observatory is staffed 24/7.
For up-to-date Ashfall Advisories and wind trajectories, please refer to the National Weather Service website: http://pafc.arh.noaa.gov/augustine.php
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
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.