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Aleutian Volcano Spits Debris September 17, 2010
Mount Cleveland
ASTER satellite image shows recent debris flows and ash fall deposits on Cleveland volcano.
Alaska’s Mount Cleveland spewed a plume of ash and steam over the central Aleutian Islands.

Satellite infrared observations detected an increase in heat within the 5,676-foot mountain, but the Alaska Volcano Observatory said that didn’t necessarily mean a larger eruption is imminent.

Vulcanologists there have put the mountain on yellow alert, but say the lack of seismic equipment on Mount Cleveland makes it difficult to monitor its activity.

They cautioned trans-Pacific aviation interests that it could take hours for new ash clouds to show up on satellite images.

Image: NASA/GSFC/METI/ERSDAC/JAROS, and U.S./Japan ASTER Science Team