Regarding Iceland: Of Course Volcanic Eruptions May Disrupt Air Transport! April 19, 2010
Posted by Jill S. Schneiderman in volcanic hazards.trackback
Flight Engineer Jeff Williams contacted the Alaska Volcano Observatory (AVO) on May 23, 2006 to report that the Cleveland Volcano, as photographed by Williams, was emitting a column of ash. The AVO reported that the ash cloud height might have achieved a height of 20,000 feet above sea level.
Cleveland Volcano, one of the most active of the volcanoes in Alaska’s Aleutian Island chain, is a stratovolcano, composed of alternating layers of hardened lava, compacted volcanic ash, and volcanic rocks. Northwestward movement of the Pacific lithospheric plate beneath the North American lithospheric plate generates magma that results in the eruptions of ash and lava from the volcano.
Watch Dina Venezky, Ph.D., a geologist for the United States Geological Survey’s volcano hazards program in Menlo Park, California, explain lucidly this type of hazard.
And check out Iceland-specific information via Scientific American’s reliable coverage.
earthdharma.org 
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