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ALASKA VOLCANO OBSERVATORY DAILY UPDATE
Sunday, May 5, 2013 12:12 PM AKDT (Sunday, May 5, 2013 20:12 UTC)


CLEVELAND VOLCANO (CAVW #1101-24-)
52°49'20" N 169°56'42" W, Summit Elevation 5676 ft (1730 m)
Current Volcano Alert Level: WATCH
Current Aviation Color Code: ORANGE

The activity at Cleveland Volcano continues as an ongoing low-level eruption. The amplitude of the Cleveland infrasonic tremor, as measured by the ground-coupled airwaves on the nearby Okmok seismic network, 120 km (80 mi) to the northeast, is decreased from its peak activity yesterday evening. Satellite data show continuous low-level emissions of gas, steam, and minor amounts of ash over the past day with a faint plume extending eastward below 15,000 ft. Satellite data also continue to show highly elevated surface temperatures at the summit.

Sudden explosions of blocks and ash are possible with little or no warning. Ash clouds, if produced, could exceed 20,000 feet above sea level. If a large ash-producing event occurs, nearby seismic, infrasound, or volcanic lightning networks should alert AVO staff quickly. However, for some events, a delay of several hours is possible. Cleveland Volcano does not have a local seismic network and is monitored using only distant seismic and infrasound instruments and satellite data.

AVO will continue to monitor the volcano and issue additional information as available.

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

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

Jeff Freymueller, Coordinating Scientist, UAFGI
jeff.freymueller@gi.alaska.edu (907) 378-7556

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.