ALASKA VOLCANO OBSERVATORY STATUS REPORT
U.S. Geological Survey
Monday, August 28, 2017, 12:48 PM AKDT (Monday, August 28, 2017, 20:48 UTC)

BOGOSLOF VOLCANO (VNUM #311300)
53°55'38" N 168°2'4" W, Summit Elevation 492 ft (150 m)
Current Volcano Alert Level: WATCH
Current Aviation Color Code: ORANGE

The explosive eruption that occurred this morning at 19:17 UTC (11:17 AKDT) August 28 produced a small volcanic cloud that reached as high as 25,000-30,000 feet above sea level before dissipating over the North Pacific Ocean. A pilot report from 20:22 UTC (12:22 AKDT) indicated that the volcanic cloud had dissipated and no ash was visible in the area. Modeling of ash fallout from the volcanic cloud indicates trace to minor ash fall over the Southern Bering Sea in the area just south of the volcano. Since this event, seismicity and infrasound as detected on neighboring islands has been quiet and no lightning has been detected.

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/.

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.

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

SUBSCRIBE TO VOLCANO ALERT MESSAGES by email: http://volcanoes.usgs.gov/vns/

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CONTACT INFORMATION:

Michelle Coombs, Scientist-in-Charge, USGS
mcoombs@usgs.gov (907) 786-7497

Jeff Freymueller, Coordinating Scientist, UAFGI
jfreymueller@alaska.edu (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.

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