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ALASKA VOLCANO OBSERVATORY CURRENT STATUS REPORT
Tuesday, July 22, 2008 11:23 AM AKDT (Tuesday, July 22, 2008 19:23 UTC)


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

Recent satellite data show a >50 km steam plume, possibly containing some ash, drifting E/SE at between 10,000 and 20,000 feet above sea level. Satellite data also show a strong thermal anomaly at Cleveland, which may indicate a lava flow. However, AVO has as of yet received no eyewitness reports of lava at Cleveland.

Please see http://www.avo.alaska.edu/activity/Cleveland.php for more information.

OKMOK VOLCANO (CAVW #1101-29-)
53°23'49" N 168°9'58" W, Summit Elevation 3520 ft (1073 m)
Current Volcano Alert Level: WATCH
Current Aviation Color Code: ORANGE

The eruption of Okmok Volcano continues. Seismicity increased overnight from around midnight to 03:00 AKDT (08:00 - 11:00 UTC), but has declined somewhat since then. Currently, seismicity consists of episodic pulses occasionally grading into continuous volcanic tremor.

Recent satellite data show plumes of steam and/or ash drifting E/SE within 50 km of Okmok at between 20,000 and 30,000 feet above sea level.

Stronger explosive activity could resume at any time with little or no warning.

Please see http://www.avo.alaska.edu/activity/Okmok.php for more information.

CONTACT INFORMATION:
John Power, Acting Scientist-in-Charge, USGS
jpower@usgs.gov, (907)786-7497

Steve McNutt, Coordinating Scientist, UAFGI
steve@giseis.alaska.edu (907)978-5458

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].
URL: www.avo.alaska.edu/activity/avoreport.php
Page modified: October 23, 2013 13:13
Contact Information: AVO Web Team

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