Explosions at the Cleveland Volcano

May 4, 2013

Multiple explosions were detected Saturday morning at the remote Cleveland Volcano in the Aleutian Islands. 3 explosive events were detected. The first came at 5-am Saturday morning, followed by a second explosion at 7:17-am. The third explosive event was recorded at 11:44-am.

The Alaska Volcano Observatory notes that the infrasound signals suggest the explosions were low-level and didn't last very long. Satellite images detected a small, low-altitude ash cloud. AVO also detected elevated surface temperatures at the summit of the volcano.

Shortly after the first explosion was detected Saturday morning AVO increased the volcano alert level to "WATCH". They also increased the aviation color code up to "ORANGE". The Cleveland Volcano has been the most active volcano in Alaska in recent years. It's on an uninhabited island in the east central Aleutian Islands. The nearest community is Nikolski about 45-miles to the west.

Photo of Mt Cleveland taken at 1800 GMT on 11 Mar 2012 by Lt. Matthew Davis aboard the NOAA ship Oscar Dyson. Photo taken while transiting north through Samalga pass while on fisheries survey. Several small explosions were detected in several days prior to the time of the photo, but very little ash is observed on the upper flanks.
Credit Matthew Davis