USGS Earthquake Notification Service

3.4 magnitude earthquake rattles Orange County

A 3.4 magnitude earthquake struck the Orange County area on Dec. 22, 2023.

Top USGS Earthquake Notification Service Headlines

L.A. retires ShakeAlertLA, transitions to statewide earthquake …

Los Angeles Mayor Eric Garcetti at the launch announcement of ShakeAlertLA, the nation’s first publicly available earthquake early warning mobile app, in January.(Credit: Irfan Khan / Los Angeles Times)

Shallow 3.4 Magnitude Quake Strikes Near Redlands

A magnitude 3.4 earthquake was reported Wednesday morning three miles from Redlands. (Credit: USGS)