Printer friendly versionAVO/USGS Volcanic Activity Notice
Current Volcano Alert Level: WATCH
Previous Volcano Alert Level: ADVISORY
Current Aviation Color Code: ORANGE
Previous Aviation Color Code: YELLOW
Wednesday, December 13, 2017, 6:15 AM AKST
Alaska Volcano Observatory
N 52 deg 49 min W 169 deg 56 min
5676 ft (1730 m)
Volcanic Activity Summary: An explosion was detected at Cleveland Volcano in seismic and infrasound data this morning 04:20 AKST (13:20 UTC). The explosion produced an eruption cloud that was observed in satellite data to an altitude of up to 20,000 ft asl and moving to the east. AVO is raising the color code for Cleveland to Aviation Color Code ORANGE and Alert Level WATCH.
[Volcanic cloud height] Small cloud detected. NWS eruption SIGMET issued to 20,000 ft asl.
[Other volcanic cloud information] Cloud moving to the east.
The National Weather Service Alaska Aviation Weather Unit has issued an eruption SIGMET warning for aviation up to 20,000 ft above sea level. This may be revised as new information becomes available. Please see the NWS AAWU at http://www.weather.gov/aawu/sigmets
for updated information on aviation warning messages.
Cleveland volcano is not monitored with a full real-time seismic network and this inhibits AVO's ability to detect unrest that may lead to future activity. We are able to detect explosive activity using infrasound and limited seismic instruments on the island.
Michelle Coombs, Scientist-in-Charge, USGS
email@example.com (907) 786-7497
Jessica Larsen, Acting Coordinating Scientist, UAF
firstname.lastname@example.org (907) 322-4085
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.