Thousands of Northern Californians were notified of the Isleton earthquake by a loud noise and alert on their phones Wednesday. That alert was sent out by USGS and its partners to notify you before the shaking. Here's how it works.
Californians across the state were rattled awake early Thursday morning when a planned test of the ShakeAlert system misfired seven hours ahead of time.
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Californians rattled awake by early-morning ShakeAlert messages marinij.com - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from marinij.com Daily Mail and Mail on Sunday newspapers.