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AVO VOLCANO ACTIVITY NOTIFICATION

ALASKA VOLCANO OBSERVATORY STATUS REPORT
U.S. Geological Survey
Wednesday, November 2, 2011, 12:03 PM AKDT (Wednesday, November 2, 2011, 20:03 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

Clouds have obscured satellite views of Cleveland volcano for most of the past 24 hours, although a thermal anomaly at the summit was observed early this morning. AVO has received no other reports of activity.

It is uncertain if effusion of lava is occurring. Continued production of lava in the summit crater could result in lava flows overtopping the crater rim and flowing down the flanks of the volcano. Portions of this lava flow could collapse and produce avalanches of hot debris that reach the sea accompanied by small ash clouds. A sudden explosion and ash cloud exceeding 20,000 ft above sea level could also occur. Such explosions could go undetected in satellite imagery for hours. However, in cooperation with the University of Washington, AVO has implemented a lightning alarm system that may detect significant ash-producing events within minutes of onset. In the event of a large ash explosion, seismic signals may be recorded on AVO seismic networks at nearby volcanoes; there is no real-time seismic network on Cleveland.

Additional information on Cleveland volcano and the current activity may be found at this link:
http://www.avo.alaska.edu/activity/Cleveland.php




CONTACT INFORMATION:

John Power, Scientist-in-Charge, USGS
jpower@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.
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URL: avo.alaska.edu/activity/report.php
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