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Subject Giant 1,000-foot-high tsunamis seen as a threat to Hawaii
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Original Message OurAmazingPlanet
updated 1 hour 34 minutes ago

SAN FRANCISCO — It's almost unimaginable: a tsunami more than 1,000 feet (300 meters) high bearing down on the island of Hawaii.

But scientists have new evidence of these monster waves, called megatsunamis, doing just that.

Unlike tsunamis from earthquakes, the Hawaiian tsunamis strike when the island chain's massive volcanoes collapse in humongous landslides. This happens about every 100,000 years, and is linked to climate change, said Gary McMurtry, a professor at the University of Hawaii in Honolulu.

The giant landslides seem to happen during periods of rising sea levels, when the climate is also warmer and wetter, Hildenbrand told OurAmazingPlanet. Researchers speculate that the change from lower sea level to higher may destabilize a volcanic island's flanks, and heavier rains could soak its steep slopes, helping trigger landslides.


[link to www.msnbc.msn.com]
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