An overflight by helicopter, on August 4, 2015, of the Cleveland volcano crater in Alaska showed that in this crater was formed a new lava dome, with concentric rings and radial fractures on its surface, surrounding the upper part of a « core ». In infrared images it was found that its temperature is 550-600º C (1022-1112 ° F).
Some occasional views of the camera helped see a small plume of steam coming out of the crater. During the overflight, small ash emissions and gas were noted, indicating that eruptive activity continues. No evidence of lava flow from the crater. On July 21, 2015, a small explosion destroyed the dome formed in November 2014. This led to the Alaska Volcano Observatory (AVO) to increase the aviation code to orange. After this explosion have continued to observe high surface temperatures of the crater, indicative of a new lava effusion.
No activity was observed cloudy satellite images or partly cloudy web camera views of Cleveland Volcano over the past 24 hours. No unusual volcanic seismicity was detected over the past day.
The Cleveland Volcano is a stratovolcano which forms the western part of the island Chuginadak a remote uninhabited island in the Aleutian Islands. It has a height of 1730 meters. The last major eruption was in 2001, with clouds of ash up to 12 km altitude. Since then, the activity has been intermittent, with a production of small lava flows, often followed by explosions with ash clouds up to 6 km above the level of the sea. These explosions also produce pyroclastic flows and lahars that sometimes reach the coast.
August 13, 2015.Cleveland, Alaska :
52 ° 49’20 « N 169 ° 56’42 » W,
Summit Elevation: 5676 ft (1730 m)
Volcano alert level: WATCH
Aviation Colour code: ORANGE
Source : AVO, GVP , Avcan.
Photo : Lyons, John