MALIBU, Calif. (AP) _ More than 100 aftershocks reverberated through the Los Angeles area Thursday, echoing a 5.0 quake coastal quake that shattered shop windows and merchandise but left local residents generally unfazed.

The 10:54 p.m. Wednesday quake, centered eight miles off the Malibu coast in Santa Monica Bay, caused three minor injuries and briefly knocked out power to 100,000 people.

The number of aftershocks recorded at the California Institute of Technology was between 100 and 200, but that was ''not terribly unusual,'' Hall Daily, a spokesman for Caltech, said late Thursday.

Most were too small to measure, said Lucile Jones, seismologist at the California Institute of Technology in Pasadena.

But two aftershocks, one at 2:02 p.m. and the other at 2:09 p.m., tentatively measured 3.7 and 3.5 on the Richter scale, respectively. They were the largest of as many as 200 aftershocks, said Caltech spokesman Hall Daily.

The quake shattered windows at the Natural Progression Surf Shop, Deane's Sportswear, Super Care Drugs and Bay Cities Beauty Supply, near the Malibu Civic Center. Rocks slid down the twisting Malibu Canyon Road and blew out some car tires.

''There's a million bottles on the ground of dye and hair color bottles. They're broken and stained the rugs. It's a big mess. We can't even open,'' said beauty shop worker Becky Granados.

''Our front window exploded and a lot of the surfboards fell over. But they were not injured,'' said surf shop employee Grady Hinsche.

Tiles fell off the law school building at Pepperdine University, and the bar at Alice's Restaurant on the Malibu Pier was littered with broken bottles.

As businesses cleaned up, life returned to Southern California normal in this celebrity enclave 30 miles southwest of Los Angeles, home of Sylvester Stallone, Johnny Carson, Dustin Hoffman and others.

Beachgoers tanned on the sands, enjoying near-80 degree temperatures, and a few surfers paddled in the calm waters.

The quake, which measured 5.0 on the Richter scale at Caltech, shook downtown Los Angeles skyscrapers and was felt 60 miles away in Riverside County.The temblor struck with the same magnitude of a 5.0 earthquake on Dec. 3 that was centered beneath downtown Pasadena.

The strongest recent earthquake was the deadly Whittier Narrows quake of Oct. 1, 1987, which measured 5.9 on the Richter scale. That quake and its 5.3- magnitude aftershock on Oct. 4 killed eight people, injured more than 200 others and caused $358 million in damage.

The Richter scale is a gauge of the energy released by an earthquake, as measured by the ground motion recorded on a seismograph. Every increase of one number means a tenfold increase in magnitude.

An earthquake of 5 on the Richter scale can cause considerable damage.