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AVO VOLCANO ACTIVITY NOTIFICATION

ALASKA VOLCANO OBSERVATORY STATUS REPORT
U.S. Geological Survey
Friday, August 15, 2008, 12:12 PM AKDT (Friday, August 15, 2008, 20:12 UTC)


KASATOCHI VOLCANO (VNUM #311130)
52°10'9" N 175°30'41" W, Summit Elevation 1030 ft (314 m)
Current Volcano Alert Level: WATCH
Current Aviation Color Code: ORANGE

The remnant volcanic ash cloud from the eruption of Kasatochi volcano last week has dissipated and is no longer detected over southeast Alaska in satellite data. A volcanic gas and aerosol cloud from the eruption persists over parts of North America and the North Atlantic region, but is dispersing and no longer a single cloud. Seismic activity at Kasatochi volcano is still being detected by the AVO seismic network on Great Sitkin Island 25 miles to the west.

AVO has received no new information about ash emissions or activity from passing pilots or mariners. Strong sulfur smell was reported by residents of Atka village yesterday and is likely coming from Kasatochi. The volcano is still quite restless and renewed eruptive activity remains a possibility.

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

Volcanic unrest continues at Cleveland volcano. Cloudy conditions in the region have obscured satellite observations today and AVO has received no new information or observations about activity at Cleveland.


OKMOK VOLCANO (VNUM #311290)
53°23'49" N 168°9'58" W, Summit Elevation 3520 ft (1073 m)
Current Volcano Alert Level: WATCH
Current Aviation Color Code: ORANGE

Eruptive activity continues at Okmok Volcano. The intensity of activity has been declining over the past several days, although the seismic intensity and tremor duration are still above background levels. Cloudy conditions have obscured observations from satellite data.



Trace ash fall may occur over parts of Umnak Island. This morning, AVO received a report of strong sulfur smell in Dutch Harbor that may be gas emissions from Okmok.

OTHER ALASKA VOLCANOES

Seismic activity is monitored in real time at 30 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. Augustine, Iliamna, Redoubt, Wrangell, Gareloi, Great Sitkin, Makushin, Fisher, Shishaldin, Isanotski, Pavlof, Veniaminof, Ugashik-Peulik, Griggs, Snowy, Fourpeaked, Aniakchak, Tanaga, Kanaga, Akutan, Westdahl, Dutton, Ukinrek Maars, Martin, Mageik, Trident, Katmai, Novarupta, Spurr, and Korovin 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:

Chris Waythomas, Acting Scientist-in-Charge, USGS
chris@usgs.gov, (907)786-7497

Jon Dehn, Acting Coordinating Scientist, UAFGI
dehn@gi.alaska.edu (907) 474-6499



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: avo.alaska.edu/activity/report.php
Page modified: December 2, 2016 10:12
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