ALASKA VOLCANO OBSERVATORY STATUS REPORT
U.S. Geological Survey
Tuesday, July 22, 2008, 12:23 PM AKDT (Tuesday, July 22, 2008, 20:23 UTC)

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

The eruption of Okmok Volcano continues. Seismicity increased overnight from around midnight to 03:00 AKDT (08:00 - 11:00 UTC), but has declined somewhat since then. Currently, seismicity consists of episodic pulses occasionally grading into continuous volcanic tremor.

Recent satellite data show plumes of steam and/or ash drifting E/SE within 50 km of Okmok at between 20,000 and 30,000 feet above sea level.

Stronger explosive activity could resume at any time with little or no warning.

Please see http://www.avo.alaska.edu/activity/Okmok.php for more information.



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

Recent satellite data show a >50 km steam plume, possibly containing some ash, drifting E/SE at between 10,000 and 20,000 feet above sea level. Satellite data also show a strong thermal anomaly at Cleveland, which may indicate a lava flow. However, AVO has as of yet received no eyewitness reports of lava at Cleveland.

Please see http://www.avo.alaska.edu/activity/Cleveland.php for more information.





CONTACT INFORMATION:

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

Steve McNutt, Coordinating Scientist, UAFGI
steve@giseis.alaska.edu (907)978-5458

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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