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ALASKA VOLCANO OBSERVATORY CURRENT STATUS REPORT
Tuesday, December 29, 2009 1:36 PM AKST (Tuesday, December 29, 2009 22:36 UTC)


REDOUBT VOLCANO (CAVW #1103-03-)
60°29'7" N 152°44'38" W, Summit Elevation 10197 ft (3108 m)
Current Volcano Alert Level: ADVISORY
Current Aviation Color Code: YELLOW

Shallow, small, repetitive earthquakes continue at Redoubt Volcano. The Aviation Color Code remains YELLOW and the Volcano Alert Level remains ADVISORY.

The current episode of increased seismicity began about 4:00 pm AKDT on December 27 following six months of relative seismic quiet at the volcano. Satellite views of Redoubt over the past several days have been mostly obscured by clouds. The clear Cook Inlet web camera image this morning shows no unusual activity or vapor plume. A pilot report this morning also indicated no plume above the volcano.

These earthquakes indicate an increased possibility of renewed eruptive activity. It is also possible that these earthquakes could diminish in number without further activity. Renewed activity could result in explosions and collapse of the summit lava dome producing volcanic ash clouds and associated ash fall, pyroclastic avalanches, and lahars and flooding down the Drift River valley.

AVO is monitoring the situation closely and will attempt to overfly the volcano and conduct other field maintenance of instrumentation sites later this week.

CONTACT INFORMATION:
Tom Murray, Scientist-in-Charge, USGS
tlmurray@usgs.gov (907) 786-7497

Steve McNutt, Coordinating Scientist, UAF
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 16, 2014 09:40
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