California's earthquake early-warning system sounded three seconds before a 4.4-magnitude quake shook Los Angeles County Tuesday night. The so-called ShakeAlert system, under development by the U.S.

This is read by an automated voice. Please report any issues or inconsistencies here. ShakeAlert sent a false alarm Thursday morning warning of a magnitude 5.9 earthquake in Carson City, Nev., that ...

MEXICO has been rocked by a huge 6.5 magnitude earthquake. Emergency alarms sounded as President Claudia Sheinbaum gave her ...

Did your phone light up this 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 alerted ...

An alert sent to people across California warning about a strong earthquake striking Northern Nevada on Thursday morning was sent in error, officials said. At 8:06 a.m., the U.S. Geological Survey ...

The ShakeAlert computer system that warns about the imminent arrival of shaking from earthquakes sent out a false alarm Thursday morning for a magnitude 5.9 temblor in Carson City, Nev., that did not ...