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AVO VOLCANO ACTIVITY NOTIFICATION

ALASKA VOLCANO OBSERVATORY WEEKLY UPDATE
U.S. Geological Survey
Friday, June 26, 2009, 1:51 PM AKDT (Friday, June 26, 2009, 21:51 UTC)


REDOUBT VOLCANO (VNUM #313030)
60°29'7" N 152°44'38" W, Summit Elevation 10197 ft (3108 m)
Current Volcano Alert Level: WATCH
Current Aviation Color Code: ORANGE

Growth of the lava dome at Redoubt volcano has significantly slowed. Seismicity remained low during the past week, but is still above background. Poor weather conditions during the last two weeks have prevented fieldwork and all but an occasional glimpse of the lava dome and steam plume by the web cameras. These glimpses, the continued low level of seismicity, and consistent lower gas emissions suggest that growth of the lava dome has significantly slowed. Redoubt remains at Orange/Watch as AVO continues to assess activity.

The last aerial observations were made on Monday, June 15. The lava dome is approximately 1,000 m in length, 460 m in width, and 200 m tall. This large mass of fresh lava may still be unstable and could fail with little or no warning, leading to significant ash production and possible lahars in the Drift River valley.

AVO continues to monitor Redoubt's activity 24/7. AVO will provide frequent updates of the volcano's status and the earliest possible warning of significant explosive activity and other hazards.


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

A small eruption at Cleveland volcano occurred Thursday, June 25, producing an ash plume that rose to less than 15,000 ft. above sea level. The plume, observed in satellite images, quickly detached from the volcano and moved south. Clouds obscure satellite views today and there have been no further reports of activity.

OTHER ALASKA VOLCANOES

Seismic activity is monitored in real time at 31 volcanoes in Alaska. Satellite images of all Alaskan volcanoes are analyzed daily for evidence of ash plumes and elevated surface temperatures. Some volcanoes may currently display anomalous behavior but are not considered to be at a dangerous level of unrest. Akutan, Aniakchak, Augustine, Dutton, Fisher, Fourpeaked, Gareloi, Great Sitkin, Griggs, Iliamna, Isanotski, Kanaga, Katmai, Korovin, Mageik, Makushin, Martin, Novarupta, Okmok, Pavlof, Shishaldin, Snowy, Spurr, Tanaga, Trident, Ugashik-Peulik, Ukinrek Maars, Westdahl, and Wrangell volcanoes are in color code GREEN and volcano alert level Normal. All are at or near normal levels of background seismicity. AVO did not detect ash plumes or significant elevated surface temperatures in the vicinity of any volcano.

Please see http://www.avo.alaska.edu/color_codes.php for complete definitions of Aviation color codes and Volcano alert levels.

VOLCANO INFORMATION ON THE INTERNET: http://www.avo.alaska.edu
RECORDING ON THE STATUS OF ALASKA'S VOLCANOES (907) 786-7478

CONTACT INFORMATION:

Tom Murray, Scientist-in-Charge, USGS
tlmurray@usgs.gov (907) 786-7497

Steve McNutt, Coordinating Scientist, UAF
steve@giseis.alaska.edu (907) 474-7131

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.
Contact AVO Privacy Accessibility Information Quality FOIA
URL: avo.alaska.edu/activity/report.php
Page modified: December 2, 2016 10:12
Contact Information: AVO Web Team

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