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ARCHIVED REPORT
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ALASKA VOLCANO OBSERVATORY

CURRENT STATUS REPORT

Friday, February 17, 2006 12:20 PM AKST (2120 UTC)




AUGUSTINE VOLCANO (CAVW#1103-01-)

59°21'48"N 153°26'W , Summit Elevation 4134 ft (1260 m)

Current Level of Concern Color Code: ORANGE



Yesterday afternoon, an AVO observation flight obtained good views and photography of the new lava dome at Augustine's summit. Clear satellite views of Augustine last night continued to show a thermal anomaly in the summit crater area. AVO seismometers are recording occasional rock falls and small pyroclastic flow signals indicative of minor collapses of the lava dome. The number of these events continues to decline, suggesting that the rate of lava effusion may be slowing.



We have no direct 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.



Dome building eruptive activity will likely 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





SPURR VOLCANO (CAVW#1103-04-)

61°17'58"N 152°15'4"W , Summit Elevation 11070 ft (3374 m)

Current Level of Concern Color Code: YELLOW



The level of seismic activity at Mount Spurr volcano remains above background. No unusual activity was observed in recent clear views of the volcano by web camera and satellite images. There are no indications that an eruption is imminent.



CLEVELAND VOLCANO (CAVW#1101-24-)

52°49'24"N 169°56'35"W , Summit Elevation 5676 ft (1730 m)

Current Level of Concern Color Code: YELLOW



No volcanic activity has been observed in partly cloudy satellite images of Cleveland.



Note: Cleveland volcano does not have a real-time seismic network and therefore we are unable to monitor seismic changes; AVO has no definitive information about background activity.



VOLCANO INFORMATION ON THE INTERNET: http://www.avo.alaska.edu



RECORDING ON THE STATUS OF ALASKA'S VOLCANOES (907) 786-7478



CONTACT INFORMATION:

Tom Murray, Scientist-in-Charge, USGS

tlmurray@usgs.gov (907) 786-7497



Steve McNutt, Acting Coordinating Scientist, UAF-GI

steve@giseis.alaska.edu (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.
VOLCANO ALERT LEVELS
NORMAL
Volcano is in typical background, noneruptive state or, after a change from a higher level, volcanic activity has ceased and volcano has returned to noneruptive background state.
ADVISORY
Volcano is exhibiting signs of elevated unrest above known background level or, after a change from a higher level, volcanic activity has decreased significantly but continues to be closely monitored for possible renewed increase.
WATCH
Volcano is exhibiting heightened or escalating unrest with increased potential of eruption, timeframe uncertain, OR eruption is underway but poses limited hazards.
WARNING
Hazardous eruption is imminent, underway, or suspected.

AVIATION COLOR CODES
GREEN
Volcano is in typical background, noneruptive state or, after a change from a higher level, volcanic activity has ceased and volcano has returned to noneruptive background state.
YELLOW
Volcano is exhibiting signs of elevated unrest above known background level or, after a change from a higher level, volcanic activity has decreased significantly but continues to be closely monitored for possible renewed increase.
ORANGE
Volcano is exhibiting heightened or escalating unrest with increased potential of eruption, timeframe uncertain, OR eruption is underway with no or minor volcanic-ash emissions [ash-plume height specified, if possible].
RED
Eruption is imminent with significant emission of volcanic ash into the atmosphere likely OR eruption is underway or suspected with significant emission of volcanic ash into the atmosphere [ash-plume height specified, if possible].

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Page modified: May 27, 2014 10:23
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