Volcano Update from Archive

Saturday, March 21, 2009 8:50 AM AKDT (Saturday, March 21, 2009 1650 UTC)

Redoubt Volcano
60°29'7" N 152°44'38" W, Summit Elevation 10197 ft (3108 m)
Current Volcano Alert Level: ADVISORY
Current Aviation Color Code: YELLOW

Shallow earthquake activity under the volcano that began yesterday continues, at times approaching one event per minute. Activity is primarily seen on the stations nearest the summit, though some events are also recorded at farther-out stations. A steam plume rising approximately a thousand feet above the volcano is visible on the Cook Inlet Redoubt web camera, but no explosive or ash activity such as occured last Sunday has been identified. AVO is watching the activity closely but remaining at Yellow/Advisory at this time.

It is still possible for unrest at the volcano to change rapidly, and seismic activity or other signs of unrest could escalate over time periods as short as 24 hours or less. Minor explosive activity such as was seen March 15 could occur with little or no warning.

A field crew is scheduled to install another seismometer at the volcano today.

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.