Tuesday, 16 July 2013

Volcanic 'scream' precedes explosive eruptions

Redoubt eruption in 2009 AVO/USGS
A change in the frequency of earthquakes may foretell explosive volcanic eruptions, according to a new study.
The seismic activity changes from steady drum beats to increasingly rapid successions of tremors.
These blend into continuous noise which silences just before explosion.

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