LOS ANGELES (CBS/AP) -- More than 100 aftershocks have rattled Orange County south of Los Angeles where a magnitude-5.1 earthquake struck Friday.

The U.S. Geological Survey says the latest, a magnitude 4.1 aftershock, struck shortly after 2:30 p.m. Saturday.

A magnitude-3.4 hit Saturday morning a mile from La Habra, about 20 miles south of Los Angeles.

Police in the nearby city of Fullerton say 20 apartment units and half a dozen homes were red-tagged, displacing 83 people.

Friday night's quake caused a rock slide, water main breaks and items to fall off shelves.

Despite the relatively minor damage, no injuries have been reported.

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