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ARCHIVED REPORT
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ALASKA VOLCANO OBSERVATORY

CURRENT STATUS REPORT

Friday, January 7, 2005 3:35 PM AST (January 8, 00:35 UTC)



ALASKA VOLCANOES WITH ELEVATED COLOR CODES:



MOUNT SPURR VOLCANO (CAVW#1103-04)

61°18' N 152°15' W, Summit Elevation 11,070 ft (3,374 m)

Current Level of Concern Color Code: YELLOW



Elevated levels of seismicity continue to be recorded beneath Mount Spurr.

No activity was visible in clear views of the volcano by satellite and web

camera today. There are no indications that an eruption is imminent.



MOUNT VENIAMINOF VOLCANO (CAVW #1102-07)

56°10'N 159°23'W, Summit Cone Elevation 7,073 ft (2,156 m)

Current Level of Concern Color Code: YELLOW



Small steam and ash emissions, several approaching 3600 m (12,000 ft) above

sea level, continue to be seen in web camera images today. A weak thermal

anomaly was detected in AVHRR satellite data collected at 6:46PM AST

Thursday (0346 UTC, Friday) but not in any subsequent images. Perryville

residents observed incandescence at the active crater Thursday night

sometime between 8:00 PM and 9:00 PM AST (0500 and 0600 UTC). Low-level

strombolian activity that ejects blocks of hot rock and lava could occur

with little warning. Activity would be confined to the caldera.



Amplitude and occurrence rate of volcanic tremor and discrete volcanic

earthquakes have increased in the past 24 hours to a level last observed

during May-June 2004. We expect that steam and ash emissions will continue

intermittently and could pose a hazard to people and low-flying aircraft in

the vicinity of the active cone.





AVO is increasing its surveillance of Mount Veniaminof, but the volcano

remains at color code YELLOW.



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



John Eichelberger, Coordinating Scientist, UAF-GI

eich@giseis.alaska.edu (907) 474-5530



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 Geophysics

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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