ALASKA VOLCANO OBSERVATORY STATUS REPORT
U.S. Geological Survey
Saturday, August 26, 2017, 6:08 PM AKDT (Sunday, August 27, 2017, 02:08 UTC)
53°55'38" N 168°2'4" W,
Summit Elevation 492 ft (150 m)
Current Volcano Alert Level: WATCH
Current Aviation Color Code: ORANGE
Following the explosive eruption that occurred at 16:29 AKDT (00:29 UTC August 27) and lasted about 4 minutes, seismicity as detected on neighboring islands has been quiet, no lightning has been detected, and satellite images show no additional emission from the volcano.
The cloud produced during today's event was observed in satellite images to drift southeast from Bogoslof and pass over southern Unalaska Island. Cloud-top temperatures seen in satellite data show that it rose to as high as 24,000 ft asl.
Bogoslof volcano remains at a heightened state of unrest and in an unpredictable condition. Additional explosions producing high-altitude volcanic clouds could occur at any time. Low-level explosive activity that is below our ability to detect in our data sources may be occurring. These low-level explosions could pose a hazard in the immediate vicinity of the volcano.
The National Weather Service Alaska Aviation Weather Unit issued a SIGMET for this eruption. Status of the ash cloud forecast can be found at the AAWU website at http://aawu.arh.noaa.gov/
OTHER ALASKA VOLCANOES
Information on all Alaska volcanoes is available at : http://www.avo.alaska.edu.
For definitions of Aviation Color Codes and Volcano Alert Levels, see: http://www.avo.alaska.edu/color_codes.php
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Michelle Coombs, Scientist-in-Charge, USGS
email@example.com (907) 786-7497
Jeff Freymueller, Coordinating Scientist, UAFGI
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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.