Printer friendly versionAVO/USGS Volcanic Activity Notice
Current Volcano Alert Level: WATCH
Current Aviation Color Code: ORANGE
Friday, February 8, 2008, 6:21 PM AKST (20080208/0321Z)
Alaska Volcano Observatory
N 52 deg 49 min W 169 deg 56 min
5676 ft (1730 m)
Volcanic Activity Summary:
Two pilot reports have been received of an eruption at Cleveland volcano at approximately 0120 UTC (16:30 AST). The plume was reported to be at 20,000 ft. above sea level. AVO sees a diffuse ash cloud extending northwest from the volcano. Clouds prevent us seeing if the plume has detached from the volcano. A diffuse low-level plume was also seen earlier in satellite data and would be consistent with an increase in activity.
Thus, AVO is raising the Aviation color code to Orange and the Alert Level to Watch.
[Volcanic cloud height] Pilot report of 20,000 ft. above sea level. A diffuse ash cloud is seen in satellite data extending northwest from the volcano, consistent with a height less than 20,000 ft. above sea level based on forecast winds.
[Ash cloud] Pilots report the height of the plume to be at 20,000 ft. above sea level. Satellite data indicate a diffuse ash cloud extending northwest from the volcano and below 20,000 ft. above sea level based on forecast winds.
AVO monitors Cleveland Volcano with satellite imagery as weather allows. 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 of ash that could exceed 20,000 ft above sea level can occur without warning and may go undetected on satellite imagery.Please see http://www.avo.alaska.edu/activity/Cleveland.php
for more information.
Tom Murray, Scientist-in-Charge, USGS
firstname.lastname@example.org (907) 786-7497
Steve McNutt, Coordinating Scientist, UAF
email@example.com (907) 474-7131
A new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at http://www.avo.alaska.edu
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.