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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).
Color Code YELLOW / Alert Level ADVISORYvolcano image
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Color Code ORANGE / Alert Level WATCHvolcano image
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AVO geochemical database now available
Posted: October 13, 2014
Whole-rock geochemical data for Quaternary Alaska volcanic rocks is now available here. This searchable database contains published whole-rock geochemical data for Quaternary volcanic rocks in Alaska, linked to geologist, publication, source volcano (where possible), and other sample and analysis metadata. The website interface allows users to query the database and return datasets as fully-documented .html or downloadable .csv tables.

Rather than a static publication, this database is intended to be updated as new volcano-related geochemical data is published. At present, the database contains analyses for more than 5,000 unique samples, making it a valuable research tool for geoscientists with interests ranging from volcano-specific processes to whole-arc data synthesis.

Please contact Cheryl Cameron or Seth Snedigar if you have further questions or comments about this dataset or the web interface.

Cameron, C.E., Snedigar, S.F., and Nye, C.J., 2014, Alaska Volcano Observatory Geochemical Database: Alaska Division of Geological & Geophysical Surveys Digital Data Series 8, https://www.avo.alaska.edu/geochem/index.php, doi:10.14509/29120
AVO Scientists Discuss Cook Inlet Volcanoes on Frontier Scientists TV Series
Posted: October 06, 2014

Redoubt Volcano

When: Monday, October 27, 8:00 pm
Available on: 360 North, GCI Cable, DirecTV, and Dish Network.

Cook Inlet Volcanoes Featured on the Frontier Scientists TV Series in October: Alaska Volcano Observatory scientists will talk about how they track and monitor volcanic activity of the Cook Inlet volcanoes and the installation of the first ever real-time monitoring equipment (seismometers, infrasound sensors, web camera) to track activity at Cleveland Volcano.

Frontier Scientists connects Alaska field scientists with those curious about Arctic discoveries by sharing first-person accounts and real time insights from leading archeologists, biologists, volcanologists, climate change specialists and other scientists.

Get these reports emailed to you: USGS VNS
Friday, October 24, 2014 12:10 PM AKDT (Friday, October 24, 2014 20:10 UTC)

54°45'19" N 163°58'16" W, Summit Elevation 9373 ft (2857 m)
Current Volcano Alert Level: WATCH
Current Aviation Color Code: ORANGE

Low-level eruptive activity likely continues at Shishaldin. Elevated surface temperatures were detected in satellite data on October 19 and 20. Small explosions were detected early in the week in seismic data. Low levels of volcanic seismicity were observed in seismic data throughout most of the week.

Shishaldin volcano, located near the center of Unimak Island in the eastern Aleutian Islands, is a spectacular symmetric cone with a base diameter of approximately 16 km (10 mi). A 200-m-wide (660 ft) funnel-shaped summit crater typically emits a steam plume and occasional small amounts of ash. Shishaldin is one of the most active volcanoes in the Aleutian volcanic arc, with at least 54 episodes of unrest including over 24 confirmed eruptions since 1775. Most eruptions are relatively small, although the April-May 1999 event generated an ash column that reached 45,000 ft above sea level.

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

No unusual activity was detected in partly cloudy satellite and webcam images from Cleveland volcano throughout the week. Seismicity remains at low levels.

Cleveland volcano forms the western portion of Chuginadak Island, a remote and uninhabited island in the east central Aleutians. The volcano is located about 75 km (45 mi) west of the community of Nikolski, and 1500 km (940 mi) southwest of Anchorage. The most recent significant period of eruption began in February, 2001 and produced 3 explosive events that generated ash clouds as high as 39,000 ft above sea level. The 2001 eruption also produced a lava flow and hot avalanche that reached the sea. Since then, Cleveland has been intermittently active producing small lava flows, often followed by explosions that generate small ash clouds generally below 20,000 ft above sea level. These explosions also launch debris onto the slopes of the cone producing hot pyroclastic avalanches and lahars that sometimes reach the coastline.

58°16'44" N 154°57'12" W, Summit Elevation 6716 ft (2047 m)
Current Volcano Alert Level: NORMAL
Current Aviation Color Code: GREEN

Strong winds in the Katmai area picked up loose 1912 volcanic ash and carried it east again this week on Thursday (10/23/14). AVO detected a cloud of resuspended ash blowing from the vicinity of Katmai and the Valley of Ten Thousand Smokes across and beyond Kodiak Island. The National Weather Service estimated the top of the plume at 4,000 feet (1,219 m) above sea level.

This phenomenon is not the result of volcanic activity and occurs seasonally in the spring and fall during times of high winds and dry snow-free conditions in the Katmai area and other young volcanic areas of Alaska. No eruption is in progress. All of the volcanoes of the Katmai area (Snowy, Griggs, Katmai, Novarupta, Trident, Mageik, Martin) remain at color code GREEN.

Resuspended volcanic ash should be considered hazardous and could be damaging to aircraft and health. For more information on volcanic ash and human health, visit the following website: http://volcanoes.usgs.gov/ash/.


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


SUBSCRIBE TO VOLCANO ALERT MESSAGES by email: http://volcanoes.usgs.gov/vns/

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John Power, Scientist-in-Charge, USGS
jpower@usgs.gov (907) 786-7497

Jessica Larsen, Acting Coordinating Scientist, UAFGI
faust@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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URL: www.avo.alaska.edu/index.php
Page modified: May 20, 2014 15:15
Contact Information: AVO Web Team

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