ALASKA VOLCANO OBSERVATORY DAILY UPDATE
U.S. Geological Survey
Monday, January 9, 2017, 1:41 PM AKST (Monday, January 9, 2017, 22:41 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

Unrest continues at Bogoslof Volcano. Two explosive eruptive events have occurred within the past 24 hours, the first at about 22:23 AKST (07:23 Jan 9 UTC) and a second event at 22:56 AKST (07:56 UTC); both events were detected in seismic and infrasound data. Since these two events, the level of seismicity has declined but remains above background and the volcano remains in a restless and unpredictable condition. Two volcanic clouds were produced by these events and were observed in satellite data. The second cloud was the larger of the two and it reached as high as 35,000 ft asl. Both plumes extended northwest of the Bogoslof Island. As a result of these events, AVO raised the Aviation Color Code to RED and Volcano Alert Level to WARNING where it remains as of today.

While Bogoslof volcano is in its current restless condition, it is possible for explosive activity to resume with little to no warning and volcanic clouds reaching flight levels may again be generated. AVO has no ground-based volcano monitoring equipment on Bogoslof volcano. We continue to monitor satellite images, information from the Worldwide Lightning Location Network pertaining to volcanic-cloud lightning, and data from seismic and infrasound instruments on nearby islands for indications of volcanic activity.

PAVLOF VOLCANO (VNUM #312030)
55°25'2" N 161°53'37" W, Summit Elevation 8261 ft (2518 m)
Current Volcano Alert Level: ADVISORY
Current Aviation Color Code: YELLOW

Minor steaming from the summit was observed in web camera images. Nothing significant was detected in seismic or pressure sensor data during the past 24 hours.

The degree of unrest at Pavlof can change quickly. A return to eruptive activity can occur with with little or no warning.

CLEVELAND VOLCANO (VNUM #311240)
52°49'20" N 169°56'42" W, Summit Elevation 5676 ft (1730 m)
Current Volcano Alert Level: ADVISORY
Current Aviation Color Code: YELLOW

Weak elevated surface temperatures were detected at the summit of Cleveland Volcano in satellite views over the past day. No significant activity was observed in seismic or pressure sensor data during the past 24 hours.

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, DGGS
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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