Volcano 'Screams' Could Lead to Better Eruption Predictions

New research indicates volcanoes often make odd noises scientists call “screams” just before they erupt, a discovery that could lead to better predictions about when a volcano will blow its top.

The screams are harmonic tremors, and researchers at the University of Washington believe they are caused when magma is forced through a narrow conduit at greater and greater pressure into the heart of the volcano.

The magma sticks to the rock surface of the conduit until there is enough pressure to …

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