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ALASKA VOLCANO OBSERVATORY INFORMATION STATEMENT
Thursday, September 20, 2007 11:23 AM AKDT (Thursday, September 20, 2007 19:23 UTC)


PAVLOF VOLCANO (CAVW #1102-03-)
55°25'2" N 161°53'37" W, Summit Elevation 8261 ft (2518 m)
Current Volcano Alert Level: ADVISORY
Current Aviation Color Code: YELLOW

Seismic activity at Pavlof Volcano declined significantly last week and remains at a low level. AVO is lowering the Aviation color code to YELLOW and the Volcano Alert Level to Advisory. An AVO field crew at the volcano yesterday observed that all eruptive activity has ceased. 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.

Rockfall from the unstable front of the lava flow remains a hazard on the southeast flank of the volcano and small dust/ash plumes could be generated but are not likely to rise above the summit of the volcano. Small lahars could be generated down drainages below the lava flow should hot rockfall debris contact snow and ice.


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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