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The Alaska Volcano Observatory (AVO) is a joint program of the United States Geological Survey (USGS), the Geophysical Institute of the University of Alaska Fairbanks (UAFGI), and the State of Alaska Division of Geological and Geophysical Surveys (ADGGS).
RESTLESS VOLCANOES
Great Sitkin
Color Code YELLOW / Alert Level ADVISORYvolcano image
Full details ...
Cleveland
Color Code ORANGE / Alert Level WATCHvolcano image
Full details ...
Veniaminof
Color Code YELLOW / Alert Level ADVISORYvolcano image
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NEWS
New publication: On the eruption age and provenance of the Old Crow tephra
Posted: February 05, 2019

Seth Burgess sampling the Old Crow tephra at the Halfway House site, south of Fairbanks. August 30, 2014
Free download here until March 26, 2019.

Read the full version

LAST ACTIVITY REPORT
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ALASKA VOLCANO OBSERVATORY DAILY UPDATE
U.S. Geological Survey
Saturday, February 16, 2019, 12:52 PM AKST (Saturday, February 16, 2019, 21:52 UTC)


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

Elevated surface temperatures observed in partially cloudy satellite views of Cleveland Volcano over the past day. No activity was detected in regional seismic or infrasound data.

The most recent explosion of Cleveland Volcano occurred on January 9, 2019. Cleveland explosions are normally short duration and only present a hazard to aviation in the immediate vicinity of the volcano. Larger explosions that present a more widespread hazard to aviation are possible, but are less likely and occur less frequently.

Local seismic and infrasound data at Cleveland have been unavailable since January 26, 2019. This restricts AVO's ability to rapidly detect an explosive eruption. AVO is able to monitor the volcano for signs of eruptive activity with satellite, lightning, and regional seismic and infrasound data.


GREAT SITKIN VOLCANO (VNUM #311120)
52°4'35" N 176°6'39" W, Summit Elevation 5709 ft (1740 m)
Current Volcano Alert Level: ADVISORY
Current Aviation Color Code: YELLOW

Nothing significant was observed in mostly cloudy satellite views of the volcano over the past day. A few small earthquakes have been detected on local seismic stations. No unrest or unusual activity noted on a nearby regional infrasound array located on Adak Island.

Great Sitkin volcano is monitored with a local real-time seismic network, which will typically allow AVO to detect changes in unrest that may lead to an explosive eruption. Rapid detection of an ash-producing eruption would be accomplished using a combination of seismic, infrasound, lightning, and satellite data.


VENIAMINOF VOLCANO (VNUM #312070)
56°11'52" N 159°23'35" W, Summit Elevation 8225 ft (2507 m)
Current Volcano Alert Level: ADVISORY
Current Aviation Color Code: YELLOW

Weakly elevated surface temperatures seen in satellite images overnight consistent with cooling lava. No activity observed in web camera images. The level of seismicity remains low.

It remains possible for eruptive activity consisting of lava effusion, ash emissions or both to resume at any time without significant precursory seismic events.

Veniaminof volcano is monitored with a local real-time seismic network, which will typically allow AVO to detect changes in unrest that may lead to a more significant explosive eruption. AVO combines seismic, infrasound, lightning, and satellite data for rapid detection of such events.


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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CONTACT INFORMATION:

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

David Fee, Coordinating Scientist, UAFGI
dfee1@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.
NEWS

RUSSIAN VOLCANO INFORMATION

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Page modified: March 19, 2018 16:09
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