Significantly larger ash bursts would be needed to affect jets flying at 30,000 feet, McNutt said.
The explosions are caused by gas pressure in the volcano building until it blasts through a skin of lava, McNutt said. The steady tremors are probably lava stirring in the volcano.Eruptions at the volcano, which last erupted in 1996, began Wednesday. Scientists have upgraded the volcano's alert level from "advisory" to its current "watch" status and pushed the aviation alert code from yellow to orange.
http://www.adn.com/news/environment/story/9234558p-9150186c.html
The explosions are caused by gas pressure in the volcano building until it blasts through a skin of lava, McNutt said. The steady tremors are probably lava stirring in the volcano.Eruptions at the volcano, which last erupted in 1996, began Wednesday. Scientists have upgraded the volcano's alert level from "advisory" to its current "watch" status and pushed the aviation alert code from yellow to orange.
http://www.adn.com/news/environment/story/9234558p-9150186c.html
As in the days of Noah...
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