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'Rosetta Stone' of supervolcanoes discovered in Italian Alps
Date:9/21/2009

f Italy was turned on end."

Bristish researchers introduced the term "supervolcano" in the last 10 years. Scientists have documented fewer than two dozen caldera eruptions in the last 1 million years.

Besides Yellowstone, other monumental explosions have included Lake Toba on Indonesia's Sumatra island 74,000 years ago, which is believed to be the largest volcanic eruption on Earth in the past 25 million years.

Described as a massive climate-changing event, the Lake Toba eruption is thought to have killed an estimated 60% of humans alive at the time.

Another caldera, and one that remains active, Long Valley in California erupted about 760,000 years ago and spread volcanic ash for 600 cubic kilometers. The ash blanketed the southwestern United States, extending from California to as far west as Nebraska.

"There will be another supervolcano explosion," Quick says. "We don't know where. Sesia Valley could help us to predict the next event."


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Contact: Kim Cobb
cobbk@mail.smu.edu
214-768-7654
Southern Methodist University
Source:Eurekalert

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