'Seismic scream' precedes volcanic eruptions
- 11 years ago
Originally published on July 19, 2013
Scientists at the University of Washington have discovered what they have dubbed a 'seismic scream' that precedes explosive volcanic eruptions. Readings taken from Alaska's Redoubt volcano prior to a 2009 eruption recorded a series of tremors around 2km below the crater. This swarm of 1,600 or so 'drumbeat' earthquakes took place in the ten hours before the first explosion.
The tremors then increased steadily in frequency and occurrence, eventually blurring into a continuous stream. The noise peaked around 30 seconds before the eruption.
The scientists believe the sounds are caused by the rapid slipping of many small faults near the conduits of molten magma as pressure builds up ahead of the eruption.
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Scientists at the University of Washington have discovered what they have dubbed a 'seismic scream' that precedes explosive volcanic eruptions. Readings taken from Alaska's Redoubt volcano prior to a 2009 eruption recorded a series of tremors around 2km below the crater. This swarm of 1,600 or so 'drumbeat' earthquakes took place in the ten hours before the first explosion.
The tremors then increased steadily in frequency and occurrence, eventually blurring into a continuous stream. The noise peaked around 30 seconds before the eruption.
The scientists believe the sounds are caused by the rapid slipping of many small faults near the conduits of molten magma as pressure builds up ahead of the eruption.
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TomoNews is your daily source for top animated news. We've combined animation and video footage with a snarky personality to bring you the biggest and best stories from around the world.
For news that's fun and never boring, visit our channel:
https://www.youtube.com/user/TomoNewsUS
Subscribe to stay updated on all the top stories:
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Stay connected with us here:
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