ALASKA VOLCANO OBSERVATORY STATUS REPORT
U.S. Geological Survey
Friday, January 27, 2017, 11:35 AM AKST (Friday, January 27, 2017, 20:35 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 eruption of Bogoslof volcano that began at 8:24 AKST (17:24 UTC) this morning produced a volcanic cloud that reached as high as 25,000 ft asl and moved towards the east as observed in satellite data. The cloud is ice-rich, but likely contains volcanic ash. This event appears similar in size to others in the ongoing eruptive sequence. Seismicity related to ash emissions remained elevated for 48 minutes before decreasing to background levels at 9:12 AKST (18:12 UTC). No further significant ash emissions have been detected in seismic or satellite data since this time, but low-level activity below our detection limit is possible and may present a hazard in the immediate vicinity of the island.

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

Status of the ash cloud can be found at the Alaska Aviation Weather Unit website at http://aawu.arh.noaa.gov/
No ash fall is expected in Dutch Harbor/Unalaska.

Since the eruption, detected seismicity is back to low levels, though further activity could occur with little or no 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

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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