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ALASKA VOLCANO OBSERVATORY DAILY UPDATE
U.S. Geological Survey
Sunday, July 1, 2018, 11:58 AM AKDT (Sunday, July 1, 2018, 19:58 UTC)
52°49'20" N 169°56'42" W,
Summit Elevation 5676 ft (1730 m)
Current Volcano Alert Level: WATCH
Current Aviation Color Code: ORANGE
Unrest continues at Cleveland volcano. Elevated surface temperatures at the summit were observed in satellite data over the past day. These thermal signals are consistent with observations earlier this week of a lava flow in the summit crater. Low-level seismic activity is ongoing, but nothing unusual was observed in seismic or pressure sensor (infrasound) data over the past day.
Cleveland volcano is monitored by only two seismic stations, which restricts AVO's ability to detect precursory unrest that may lead to an explosive eruption. Rapid detection of an ash-producing eruption may be possible using a combination of seismic, infrasound, lightning, and satellite data.
GREAT SITKIN VOLCANO
52°4'35" N 176°6'39" W,
Summit Elevation 5709 ft (1740 m)
Current Volcano Alert Level: ADVISORY
Current Aviation Color Code: YELLOW
Unrest has resumed and is continuing at Great Sitkin Volcano. Earlier today, AVO raised the Aviation Color Code and Volcano Alert level to YELLOW/ADVISORY based on an increase in earthquake activity at the volcano. Seismic activity over the past day has been above background levels. Nothing noteworthy has been observed in satellite data over the past day and AVO has received no reports of activity at the volcano.
OTHER ALASKA VOLCANOES
Information on all Alaska volcanoes is available at : http://www.avo.alaska.edu.
For definitions of Aviation Color Codes and Volcano Alert Levels, see: http://www.avo.alaska.edu/color_codes.php
SUBSCRIBE TO VOLCANO ALERT MESSAGES by email: http://volcanoes.usgs.gov/vns/
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Michelle Coombs, Scientist-in-Charge, USGS
firstname.lastname@example.org (907) 786-7497
Jeff Freymueller, Coordinating Scientist, UAFGI
email@example.com (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.