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ARCHIVED REPORT
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ALASKA VOLCANO OBSERVATORY

CURRENT STATUS REPORT

Thursday, February 24, 2005 4:00 PM AST (Feb 25 0100 UTC)



ALASKA VOLCANOES WITH ELEVATED COLOR CODES:



MOUNT VENIAMINOF VOLCANO (CAVW #1102-07)

5610'N 15923'W, Summit Cone Elevation 7,073 ft (2,156 m)

Current Level of Concern Color Code: ORANGE



Seismicity at Veniaminof volcano has remained at low levels over the past

24 hours. Long periods of little or no seismicity and occasional short

intervals of tremor or discrete events characterize the present activity.

The volcano has been occasionally visible by internet camera in Perryville,

and in satellite images but nothing of note has been observed. Although

activity has diminished somewhat, Strombolian explosions of steam and ash

similar to those observed over the past month can occur at any time and

these could rise to more than 13,00 ft (4,000m) above sea level. Ash bursts

and drifting ash clouds could pose a hazard to people and low flying

aircraft in the vicinity of the active cone. Very light ash fall with

little accumulation outside of the summit caldera is also possible. There

are no indications that a larger eruption is imminent.



MOUNT SPURR VOLCANO (CAVW#1103-04)

6118' N 15215' W, Summit Elevation 11,070 ft (3,374 m)

Current Level of Concern Color Code: YELLOW



Elevated levels of seismicity continue much as they have for the past

several weeks. Clouds obscured the volcano in web camera and satellite

views. There are no indications that an eruption is imminent.



KOROVIN VOLCANO (CAVW #1101-16)

52.381 N 174.154 W, Summit Cone Elevation 5,029 ft (1,533 m)

Current Level of Concern Color Code: YELLOW

Previous Level of Concern Color Code: GREEN



Ash and steam bursts reaching approximately 8000 ft (2440 m) above sea

level occurred on Wednesday evening, February 23, 2005 as reported by

residents of Atka village. Since then, no new information or observations

have been reported to AVO. Ash bursts and drifting ash clouds could pose a

hazard to people and low flying aircraft in the vicinity of the volcano and

light ash fall on parts of Atka Island, including the village of Atka may

occur. There are no indications that a large eruption is imminent.



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



Chris Nye, Acting Coordinating Scientist, UAF-GI

cnye@gieis.alaska.edu (907) 474-7430



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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