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22 November 2016

Here’s what earthquake early warning looks like

When a large earthquake struck the coast of Japan near Fukushima Tuesday morning, people all across the country were alerted nearly immediately–most in advance of significant shaking at their location–by the nation’s sophisticated early warning system. Early warning doesn’t predict the onset of an earthquake, but it does predict the shaking level and time of arrival at locations all around the epicenter once one has begun but before its seismic …

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