Printer friendly versionAVO/USGS Volcanic Activity Notice
Current Volcano Alert Level: WARNING
Current Aviation Color Code: RED
Previous Aviation Color Code: ORANGE
Sunday, February 19, 2017, 6:07 PM AKST
Alaska Volcano Observatory
N 53 deg 55 min W 168 deg 2 min
492 ft (150 m)
Volcanic Activity Summary: A significant explosive eruption began at Bogoslof volcano at 02:08 UTC on 20 February (17:08 AKST on 19 February). Seismic and infrasound data show a series of short-lived explosive pulses through 02:45 UTC; seismicity has been quiet since then. Recent satellite images show a cloud as high as 25,000 ft asl. Thus, AVO is raising the Aviation Color Code to RED and Alert level to WARNING for Bogoslof volcano.
Winds are carrying the cloud from Bogoslof to the southeast, towards Unalaska Island.
[Volcanic cloud height] 25,000 ft asl estimated by satellite
[Other volcanic cloud information] Cloud moving towards southeast
[Ashfall] Trace of ash fallout on Unalaska Island possible.
The SIGMET warning message for aviation, issued by the National Weather Service Alaska Aviation Weather Unit, currently is in effect up to 25,000 ft above sea level. Status of the ash cloud forecast can be found at their website at http://aawu.arh.noaa.gov/
for details on ash fall forecasts from the National Weather Service.
Michelle Coombs, Scientist-in-Charge, USGS
firstname.lastname@example.org (907) 786-7497
Jeff Freymueller, Coordinating Scientist, UAFGI
email@example.com (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.