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ALASKA VOLCANO OBSERVATORY CURRENT STATUS REPORT
Friday, February 22, 2008 1:09 PM AKST (Friday, February 22, 2008 22:09 UTC)


VENIAMINOF VOLCANO (CAVW #1102-07-)
56°11'52" N 159°23'35" W, Summit Elevation 8225 ft (2507 m)
Current Volcano Alert Level: ADVISORY
Current Aviation Color Code: YELLOW

Several minor bursts of ash from Veniaminof were observed on AVO Webcam images and recorded in seismic data this morning. The bursts rose less than 9,000 ft ASL (only a few hundred feet above the active intracaldera cinder cone), and were confined to the caldera. Sporadic increases in seismic activity have been noted since February 11, including bursts of tremor lasting 1-2 minutes occurring several times per hour. Seismic activity today includes events at the same times as the observed ash bursts. Several of the seismic events are stronger than those observed over the previous ten days, and are similar to signals observed during eruptions in 2005.

AVO raised the Aviation color code to Yellow and the Alert Level to Advisory earlier today.

There are no indications that more vigorous activity is imminent or even likely. These small ash bursts are typical of activity at Veniaminof over the past several years. We expect that steam and ash emissions similar to those observed today may continue intermittently and could pose a hazard to people and low-flying aircraft in the vicinity of the active cone.

AVO will continue to monitor activity at Mount Veniaminof using seismic data, satellite images, internet camera data and observer reports.

CLEVELAND VOLCANO (CAVW #1101-24-)
52°49'20" N 169°56'42" W, Summit Elevation 5676 ft (1730 m)
Current Volcano Alert Level: ADVISORY
Current Aviation Color Code: YELLOW

Clouds obscured satellite views of Cleveland last night. No reports of activity have been received.

AVO monitors Cleveland Volcano with satellite imagery as weather allows. The lack of a real-time seismic network at Cleveland means that AVO is unable to track local earthquake activity related to volcanic unrest. Short-lived explosions of ash that could exceed 20,000 ft above sea level can occur without warning and may go undetected on satellite imagery.Please see http://www.avo.alaska.edu/activity/Cleveland.php for more information.

CONTACT INFORMATION:
Christina Neal, Acting, Scientist-in-Charge, USGS
tneal@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].
Contact AVO Privacy Accessibility Information Quality FOIA
URL: www.avo.alaska.edu/activity/avoreport.php
Page modified: May 16, 2014 09:40
Contact Information: AVO Web Team

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