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AVO VOLCANO ACTIVITY NOTIFICATION

ALASKA VOLCANO OBSERVATORY INFORMATION STATEMENT
U.S. Geological Survey
Saturday, August 9, 2008, 5:23 PM AKDT (Sunday, August 10, 2008, 01:23 UTC)


KASATOCHI VOLCANO (VNUM #311130)
52°10'9" N 175°30'41" W, Summit Elevation 1030 ft (314 m)
Current Volcano Alert Level: WARNING
Current Aviation Color Code: RED

The intensity of seismic activity associated with the Kasatochi eruption has markedly decreased to the level where AVO's seismic network on nearby Great Sitkin Island (about 40 km (25 mi) to the east) is no longer able to detect activity at Kasatochi volcano. Kasatochi has no seismic network; thus AVO does not have the means to monitor seismicity normally associated with eruptive activity. Some larger events may be seen seismically, but in general AVO will rely on satellite and visual reports to monitor activity.

Given the intensity of eruptive activity over the past several days and large ash clouds observed in satellite images AVO is keeping the aviation color code and alert level at RED/WARNING until it can be determined that eruptive activity has declined.

The recent eruptive activity was sufficiently strong to be recorded at seismic stations on Great Sitkin and elsewhere in the region. This intensity (earthquakes with magnitudes greater than M5) is atypical.


VOLCANO INFORMATION ON THE INTERNET: http://www.avo.alaska.edu

RECORDING ON THE STATUS OF ALASKA'S VOLCANOES (907) 786-7478

CONTACT INFORMATION:

Chris Waythomas, Acting Scientist-in-Charge, USGS
chris@usgs.gov, (907)786-7497

Jon Dehn, Acting Coordinating Scientist, UAFGI
dehn@gi.alaska.edu (907) 474-6499



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.
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