Weird Electromagnetic Bursts Appear Before Earthquakes – And We May Finally Know Why – ScienceAlert

For some time, seismologists have been aware of brief, subtle anomalies in underground electrical fields leading up to an earthquake, sometimes occurring as soon as a few weeks before the quake happens.
It’s tempting to think these electromagnetic bursts could be used to predict when a quake will strike. Up until now, however, the cause of the strange bursts hasn’t been clear.
New research suggests that the key lies in the gases that get trapped in what’s known as a fault valve and can build up…

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