Volcano 'Screams' Before Eruption

Guest:

Alicia Hotovec-Ellis, Doctoral student, Department of Earth and Space Sciences, University of Washington

In 2009, Alaska's Redoubt volcano erupted and sent plumes of ash miles into the air. But underground, there was even more activity. In a study published in Nature Geoscience, researchers say the volcano experienced a large number of pre-eruption earthquakes that created a "scream."

Source: http://www.npr.org/2013/07/19/203606164/volcano-screams-before-eruption?ft=1&f=1007

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