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ALASKA VOLCANO OBSERVATORY DAILY UPDATE
U.S. Geological Survey
Thursday, July 28, 2016, 3:00 PM AKDT (Thursday, July 28, 2016, 23:00 UTC)

PAVLOF VOLCANO (VNUM #312030)
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 Aviation Color Code and the Volcano Alert Level were increased to ORANGE/WATCH this morning at Pavlof. Vigorous steam degassing was observed in web camera images from Cold Bay (35 miles or 60 km SW) and Black Hills (20 miles or 35 km NNE) this morning. Satellite observations and pilot reports indicate minor amounts of ash associated with the steam cloud at an altitude of less than 15,000 ft (4.5 km) above sea level. Seismicity remains elevated, with periods of volcanic tremor continuing. Please refer to the NWS Anchorage Volcanic Ash Advisory Center (http://vaac.arh.noaa.gov/) and the Alaska Aviation Weather Unit (http://aawu.arh.noaa.gov/) for current aviation information products.

Activity is currently at relatively low levels. An increase in eruptive activity is possible and could occur with little or no warning. AVO will continue to monitor the volcano closely.

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

Unrest continues. Satellite and web camera observations obscured by clouds. No significant activity observed in seismic or infrasound (pressure sensor) data.

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/

FOLLOW AVO ON FACEBOOK: https://facebook.com/alaska.avo

FOLLOW AVO ON TWITTER: https://twitter.com/alaska.avo

CONTACT INFORMATION:

John Paskievitch, Acting Scientist-in-Charge, USGS
jpaskie@usgs.gov (907) 786-7497

Jeff Freymueller, Coordinating Scientist, UAFGI
jfreymueller@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.