Alaska Volcano: Alert Level Raised After Cleveland Volcano Erupted

By on Jun 22, 2012 in Current Events, Environment, Science, United States, World Comments
Cleveland Volcano

The Alaska Volcano: Cleveland Volcano
(taken May 3, 2006)

Image Credit: NASA

An aviation alert level of “orange” has been raised after Cleveland Volcano, a remote volcano in Alaska produced an ash cloud several miles high after a small eruption.

According to a CNN report on Wednesday, June 20, 2012, the Cleveland Volcano on the Aleutian Islands southwest of mainland Alaska erupted briefly on Tuesday afternoon. It created an ash cloud with a height of approximately 23,000 feet above sea level.

Below is the full text of Alaska Volcano Observatory Current Status Report regarding the Cleveland Volcano published on their official website on Wednesday, June 20, 2012 12:53PM AKDT:

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

No further explosive activity has been detected at Cleveland Volcano following the event at 22:05 UTC (14:05 AKDT) yesterday. The small ash emission resulting from that explosion was last visible in satellite data east-southeast of the volcano at 07:17 UTC on June 20 (23:12 AKDT June 19) before dissipating. Due to the increased likelihood of explosive activity at Cleveland, the Aviation Color Code/Volcano Alert Level remains at ORANGE/WATCH.

Additional sudden explosions of blocks and ash are possible with little or no warning. It is possible for associated ash clouds to exceed 20,000 feet above sea level. If a large ash-producing event occurs, seismic, infrasound, or volcanic lightning networks should detect the event and alert AVO staff. There is no real-time seismic monitoring network on Mount Cleveland so AVO is unable to track activity in real time.

Cleveland volcano forms the western half of Chuginadak Island, a remote and uninhabited island in the east central Aleutians. It is located about 75 km (45 mi.) west of the community of Nikolski, and 1500 km (940 mi.) southwest of Anchorage. The volcano’s most recent significant eruption began in February, 2001 and it produced 3 explosive events that produced ash clouds as high as 12 km (39,000 ft) above sea level. The 2001 eruption also produced a rubbly lava flow and hot avalanche that reached the sea. The most recent minor ash emissions were observed in December 2011.



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