We've all been told to prepare for "the big one," but scientists say there is a different natural disaster we may not be ready for.
The U.S. Geological Survey reports there is a 16 percent possibility of a small to moderate volcanic eruption happening in California within the next 30 years.
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Just to compare, scientists say there's a 22 percent possibility of "the big one" along the San Andreas Fault during the same time frame.
California has eight volcanic areas, putting 200,000 people at risk of an eruption.
California has 16 percent chance of volcanic eruption
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