ALASKA VOLCANO OBSERVATORY STATUS REPORT
U.S. Geological Survey
Saturday, June 10, 2017, 6:19 AM AKDT (Saturday, June 10, 2017, 14:19 UTC)

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

The explosive eruptive activity that occurred this morning from about 3:18 to 5:28 AKDT (11:18 to 13:28 UTC) has ended. This sequence began with a series of short infrasound signals and then, starting at about 4:16 AKDT (12:16 UTC), transitioned into several minutes-long continuous seismic and infrasound tremor signals. Satellite images of the resulting cloud show it reached as high as 34,000 ft asl and drifted to the northwest. Satellite data also indicate that at least part of the volcanic cloud was more ash-rich than most of those seen previously in the Bogoslof eruptive sequence to date. This suggests that the eruption may have destroyed the lava dome that was emplaced earlier this week.

Since 5:28 AKDT (13:28 UTC), seismicity as detected on neighboring islands has been quiet, no lightning has been detected, and satellite images show no additional emission from the volcano.

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 Aviation Color Code remains at RED and the Alert Level remains at WARNING.

Status of the ash cloud forecast can be found at the National Weather Service Alaska Aviation Weather Unit website at http://www.weather.gov/aawu/sigmets

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

Jessica Larsen, Acting Coordinating Scientist, UAF
jflarsen@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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