Printer friendly versionALASKA VOLCANO OBSERVATORY
Thursday, September 20, 2007 11:20 AM AKDT (1920 UTC)
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 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 Typical background activity of a volcano in a non-eruptive state
ADVISORY Elevated unrest above known background activity
WATCH Volcano is exhibiting heightened or escalating unrest with increased potential for eruptive activity
WARNING Highly hazardous eruption underway or imminent
ABBREVIATED AVIATION COLOR CODE KEY:
GREEN volcano is dormant; normal seismicity and fumarolic activity occurring
YELLOW volcano is restless; eruption may occur
ORANGE volcano is in eruption or eruption may occur at any time
RED significant eruption is occurring or explosive eruption expected at any time
Please see http://volcanoes.usgs.gov/2006/vhpalertlevel.pdf for a complete description of alert levels and color codes.
VOLCANO INFORMATION ON THE INTERNET: http://www.avo.alaska.edu
RECORDING ON THE STATUS OF ALASKA'S VOLCANOES (907) 786-7478
Tom Murray Scientist-in-Charge, USGS
firstname.lastname@example.org (907) 786-7497
Steve McNutt, Coordinating Scientist, UAF
email@example.com (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.