Have you ever heard a volcano scream?
We all know volcano erupt, but did you know they scream as well?
A team of volcanologists have discovered that before an eruption, volcanoes make a noise that resembles a scream. The sounds in the video were recorded prior to a 2009 eruption of the redoubt in Alaska.
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Experts say this "scream" is caused by friction as magma slips past the rocks around it.
Scientists say this discovery could provide insight into what happens during a volcano's eruptive cycle -- but because it happens just before an actual event, it probably won't help with eruption prediction.