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U.S. Geological Survey
Tuesday, May 17, 2016, 11:14 AM AKDT (Tuesday, May 17, 2016, 19:14 UTC)

55°25'2" N 161°53'37" W, Summit Elevation 8261 ft (2518 m)
Current Volcano Alert Level: WATCH
Current Aviation Color Code: ORANGE

The intermittent low-level eruption of Pavlof Volcano that began on May 13, 2016 continues. Periods of elevated volcanic tremor and a small explosion associated with minor ash emissions have been observed today, beginning around 12:45 UTC (4:45 am AKDT). Ash emissions have been reported by observers in Cold Bay (60 km or 35 miles SE) and Sand Point (90 km or 55 miles E) this morning, interspersed by reports of steaming. The National Weather Service SIGMET warning for aviation users reports that ash is below an altitude of 15,000 ft (4.6 km) above sea level. Please refer to http://www.weather.gov/aawu/sigmets for updated SIGMETs. Ash emissions are not identifiable in satellite images and views of the volcano from the FAA web camera at Cold Bay are obscured by low clouds.

The current level of eruptive activity is much less energetic than the previous eruption on March 27-28, 2016. Ash emissions are short-lived and have dissipated rapidly. There is no evidence in satellite data of highly elevated surface temperatures from lava fountaining and/or a lava flows that are typically associated with more energetic eruptions. It is likely that activity will continue to fluctuate, and AVO will continue to monitor Pavlof closely for signs of an increase in eruption intensity.

52°49'20" N 169°56'42" W, Summit Elevation 5676 ft (1730 m)
Current Volcano Alert Level: WATCH
Current Aviation Color Code: ORANGE

Volcanic unrest continues at Cleveland Volcano. No activity observed in partly cloudy satellite images over the past day. Seismicity remains low and no explosions have been detected in infrasound (pressure sensor) data.


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


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

Jeff Freymueller, Coordinating Scientist, UAFGI
jeff.freymueller@gi.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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Page modified: December 2, 2016 10:12
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