ShakeAlert earthquake early warning system goes live in Washington state — here’s how it works

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A team from the UW-based Pacific Northwest Seismic Network installs a new solar panel array at a seismic monitoring site in Enumclaw, Wash., in April. The seismometer, one of hundreds that provide data for ShakeAlert, is in the hole in the foreground. A trench brings cables to the newly installed solar panels, on the right, that power the system, and…
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