For hundreds of thousands of local residents, the first sign of Thursday's earthquake wasn't the shaking; it was the alarm and alert they got on their phones moments before the quake hit. According to ...

Los Angeles residents were not pleased last week when a pair of earthquakes struck and the ShakeAlertLA app on their phones did just what it was supposed to do: nothing. The app, released to the ...

Did your phone light up Thursday morning with an earthquake alert? Good news: There was no quake. The ShakeAlert early warning system that notifies people about earthquakes as they are occurring ...

Preparedness saves lives. That's the message California is sending to residents. April marks Earthquake Preparedness Month.