San Gabriel Valley Newspaper Group
July 29: AutoZone manager Daniel Sanchez cleans up after an earthquake knocked products off shelves in Diamond Bar, Calif.
 LOS ANGELES —  Despite shaking a large swath of Southern California, a magnitude-5.4 earthquake was not the "Big One" that scientists have long feared. Still, it rattled nerves, causing people to vow to step up their emergency preparations.
The quake, which rocked the region from Los Angeles to San Diego on Tuesday, caused only limited damage and minor injuries, and served as a reminder of the seismic danger below sprawling freeways and subdivisions.
The temblor's epicenter was located just outside Chino Hills, 29 miles southeast of downtown Los Angeles in San Bernardino County, and it was felt as far east as Las Vegas. Dozens of aftershocks followed, the largest a magnitude-3.8.
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