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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
Cleveland
Color Code ORANGE / Alert Level WATCHvolcano image
Full details ...
Shishaldin
Color Code YELLOW / Alert Level ADVISORYvolcano image
Full details ...

New publication: Geologic map of Chiginagak volcano
Posted: January 05, 2018

Chignagak volcano. Photo by Willie Scott, August 24, 2008.

A newly published geologic map, map report, and its associated GIS files is available for download here. Chiginagak volcano is a small volcanic center on the Alaska Peninsula, with historical observations of fumarolic activity, and a 2005 noneruptive summit heating event and subsequent ice melt, lahar, acid flood, and sulfuric-acid-aerosol release.
New publication: Major-element glass compositions of tephra from the circa 3.6 ka eruption of Aniakchak volcano, Alaska Peninsula, Alaska
Posted: January 05, 2018

Aniakchak Caldera, photo by Tim Plucinski
Major-element glass compositions of tephra from the circa 3.6 ka eruption of Aniakchak volcano, Alaska Peninsula, Alaska publication is now available for download, here.
ABSTRACT:
This Raw Data File presents major-oxide glass geochemical results from the ca. 3.6 ka caldera-forming eruption of Aniakchak volcano, Alaska. These data are part of a larger effort to identify and characterize tephra deposits from the largest eruptions in Alaska for use as geochronological marker horizons. Aniakchak is one of at least 29 volcanoes in Alaska that has had multiple large tephra-producing eruptions. Other deposit and sample metadata including geospatial distributions of this tephra deposit are held in the Alaska Volcano Observatory’s online database, the Geologic Database of Information on Volcanoes in Alaska (GeoDIVA), and will be linked to these new geochemical data once published. Products included in this data release are background information on the larger project, methods of sample collection, processing, analysis, and data reduction spreadsheets showing 1)raw point major-oxide data, 2)normalized and averaged major-oxide data, and 3)basic sample metadata.
New publication: The 2014 eruptions of Pavlof Volcano, Alaska
Posted: January 05, 2018

Pavlof, Nov 2014. Photo by Doug Damberg
The 2014 eruptions of Pavlof Volcano, Alaska publication is available for download here. This publication details the chronology and eruptive products of Pavlof's May 2014 and November 2014 eruptions.
New publication: Historically active volcanoes of Alaska reference deck, v.2
Posted: January 05, 2018

Volcano reference deck
This publication is a little unusual, as it is in the form of playing cards. Each full-color card provides the location and photo of a historically active volcano and up to four icons describing its historical activity. The icons represent characteristics of the volcano, such as a documented eruption, fumaroles, deformation, or earthquake swarms; a legend card is provided. See DGGS website here for more information and how to order.

LAST ACTIVITY REPORT
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ALASKA VOLCANO OBSERVATORY DAILY UPDATE
U.S. Geological Survey
Sunday, January 21, 2018, 10:18 AM AKST (Sunday, January 21, 2018, 19:18 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

Unrest continues at Cleveland volcano. Moderately elevated surface temperatures were observed in mostly clear satellite views over the past day. Nothing significant detected in seismic or infrasound data during the last 24 hours.

SHISHALDIN VOLCANO (VNUM #311360)
54°45'19" N 163°58'16" W, Summit Elevation 9373 ft (2857 m)
Current Volcano Alert Level: ADVISORY
Current Aviation Color Code: YELLOW

Low-level unrest continues at Shishaldin volcano. Over the last 24 hours, repetitive low frequency earthquakes from the summit area have continued above background levels. Nothing significant observed in mostly clear satellite data.

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

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CONTACT INFORMATION:

Michelle Coombs, Scientist-in-Charge, USGS
mcoombs@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.
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Page modified: November 29, 2017 12:41
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