ALASKA VOLCANO OBSERVATORY STATUS REPORT
U.S. Geological Survey
Friday, December 30, 2016, 8:51 AM AKST (Friday, December 30, 2016, 17:51 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

Bogoslof has been relatively quiet since the ash-producing eruption last night at 23:45 Dec 29 AKST (08:45 Dec 30 UTC), though additional low-level seismicity occurred around 04:25 AKST (13:25 UTC) to 05:00 AKST (14:00 UTC), and it remains at an elevated state of unrest. Last night's explosion was similar in size to previous ones during this eruptive sequence, and was detected by seismic sensors at nearby islands and infrasound sensors in Dillingham, which were used to estimate an event duration of about 30 minutes. The volcanic cloud from the event was visible in satellite images moving away from the volcano to the northeast at an estimated height of 20,000 ft asl.

Due to the unpredictability of the situation, the Aviation Color Code remains RED and the Volcano Alert Level WARNING.

AVO has no ground-based volcano monitoring equipment on Bogoslof volcano. We continue to monitor satellite images, data from distant seismic and infrasound instruments, and information from the Worldwide Lightning Location Network for indications of significant activity.

OTHER ALASKA VOLCANOES

Other Alaska volcanoes show no signs of significant unrest: http://www.avo.alaska.edu/activity/

AVO scientists conduct daily checks of earthquake activity at all seismically-monitored volcanoes, examine web camera and satellite images for evidence of airborne ash and elevated surface temperatures, and consult other monitoring data as needed.

For definitions of Aviation Color Codes and Volcano Alert Levels, see: http://www.avo.alaska.edu/color_codes.php

FOR MORE INFORMATION ON ALASKA VOLCANOES: http://www.avo.alaska.edu

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

Janet Schaefer, Acting Coordinating Scientist, UAFGI
janet.schaefer@alaska.gov (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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