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ALASKA VOLCANO OBSERVATORY DAILY UPDATE
Wednesday, August 21, 2013 11:56 AM AKDT (Wednesday, August 21, 2013 19:56 UTC)


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

The level of seismicity associated with eruptive activity at the intracaldera cone of Veniaminof Volcano has declined over the past 24 hours. The seismicity has become more episodic and now fluctuates between periods of relative quiet and short periods of low-level nearly continuous tremor. Minor ash and steam emissions are likely still occurring, but effusion of lava may have slowed down or possibly stopped. Elevated surface temperatures at the cone were observed in satellite data over the past 24 hours, but views of the intracaldera cone from the FAA web camera in Perryville this morning have been obscured by clouds. Yesterday, residents of Perryville reported hearing loud explosions coming from the volcano and air waves were detected by infrasound equipment in Dillingham, about 200 miles northeast of the volcano. Such explosions are not uncommon for the type of eruptive activity occurring at Veniaminof and do not represent a significant change in the level of unrest. Audible sounds and explosions may be heard when observers are downwind of the volcano and are no cause for concern.

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

No anomalous activity at Cleveland was observed in satellite imagery during the last 24 hours. AVO has received no other reports of activity at the volcano.

VOLCANO INFORMATION ON THE INTERNET: http://www.avo.alaska.edu
RECORDING ON THE STATUS OF ALASKA'S VOLCANOES (907) 786-7478

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

David Fee, Acting Coordinating Scientist, UAFGI
dfee@gi.alaska.edu (907) 474-7564

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
Contact Information: AVO Web Team

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