Printer friendly versionALASKA VOLCANO OBSERVATORY
Current Status Report
Saturday, July 21, 2007 1:30 PM AKDT (2130 UTC)
52°49'20" N169°56'42" W, Summit Elevation 5676 ft (1730 m)
Current Aviation Color Code: ORANGE
Current Volcano Alert Level: Watch
A thermal anomaly persists at Cleveland volcano in satellite data, indicating that low-level eruptive activity may be continuing. No steam plume was seen, nor any indications of ash being emitted. The possibility of an explosion sending an ash cloud to heights in excess of 20,000 ft above sea level remains.
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 with ash plumes that could exceed 20,000 ft above sea level can occur without warning and may go undetected on satellite imagery.
KOROVIN VOLCANO (ATKA ISLAND)
52°22'48" N174°9'22" W, Summit Elevation 5030 ft (1533 m)
Current Aviation Color Code: YELLOW
Current Volcano Alert Level: Advisory
Intermittent, low-level seismic activity continues at Korovin. Clouds obscured the volcano in satellite views. AVO has received no new information about activity at Korovin in the past 24 hours.
Korovin has erupted several times in the past 200 years, most recently in 1998. Eruptions typically produce minor amounts of ash and occasional, small lava flows. Ash plume heights could exceed 20,000 ft above sea level. Korovin occasionally produces large steam plumes from its summit.
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
email@example.com (907) 786-7497
Steve McNutt, Coordinating Scientist, UAF-GI
firstname.lastname@example.org (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.