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ARCHIVED REPORT
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ALASKA VOLCANO OBSERVATORY


Current Status Report


Sunday, September 23, 2007 1:05 PM AKDT (2105 UTC)




AUGUSTINE VOLCANO (CAVW#1103-01-)

59°21'45" N153°26'6" W, Summit Elevation 4134 ft (1260 m)

Current Aviation Color Code: YELLOW

Current Volcano Alert Level: Advisory



Shallow seismic activity at Augustine Volcano continues. Clouds have obscured the summit from satellite views.



The current earthquakes are small, generally less than magnitude 1.0, and are located at shallow depth beneath the volcano's summit. While significant, the current earthquake activity is much less energetic than that which immediately preceeded the explosive eruptions in January 2006. However, some disruption of the summit dome may be occurring as a result of this activity and increased rockfall and avalanche activity may occur.



PAVLOF VOLCANO (CAVW#1102-03-)

55°24'57" N161°53'24" W, Summit Elevation 8261 ft (2518 m)

Current Aviation Color Code: YELLOW

Current Volcano Alert Level: Advisory



Seismic activity at Pavlof Volcano remains low. Partly cloudy conditions obscure the volcano from satellite and web camera views today. The decrease in seismicity and cessation of eruptive activity may be only a lull in the current eruption. Typical eruptions at Pavlof are characterized by periods of diminished activity interspersed with periods of renewed eruptive activity that can begin at any time with little seismic warning. AVO will continue to monitor the volcano closely.



CLEVELAND VOLCANO (CAVW#1101-24-)

52°49'20" N169°56'42" W, Summit Elevation 5676 ft (1730 m)

Current Aviation Color Code: YELLOW

Current Volcano Alert Level: Advisory



Partly cloudy conditions obscured views of the volcano by satellite.



AVO continues to monitor the volcano closely 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.



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



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 27, 2014 10:23
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