Contact: Andy Fell
University of California - Davis
Caption: Rocks ejected from Mt. Hood show that the magma under the volcano has been liquid enough to erupt for less than 10 percent of the last 20,000 years. If generally true, this could have implications for understanding when a volcano is most ready to erupt.
Credit: Eric Klemetti, Denison University
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Related news release: Mount Hood study suggests volcano eruptibility is rare