AutoZone manager Daniel Sanchez cleans up after an earthquake knocked products off shelves in Diamond Bar, Calif., July 29, 2008. The magnitude 5.4 earthquake struck near the San Bernardino County city of Chino Hills.
Children at Sparks Elementary school in La Puente, Calif. take cover under a table bracing for the earthquake that shook their classroom on July 29, 2008.
Residents look at an earthquake damaged building in Pomona, Calif., July 29, 2008.
Steven Manning takes a photograph of debris that fell as the result of an earthquake on July 29, 2008, in Los Angeles.
A man peers through a window next to a sign indicating closure due to an earthquake at a Bath and Body Works store in Chino Hills, Calif., July 29, 2008.
People stand in an alleyway behind police tape near where bricks fell from an unoccupied building during an earthquake, July 29, 2008, in Pomona, Calif., near Los Angeles.
Seismic Network Field Engineer Mike Watkins looks at computer monitors that show seismic activity at the California Institute of Technology (CalTech), July 29, 2008, in Pasadena, Calif.
Evacuees wait in the motor court of a garden-style office building in downtown Los Angeles after an earthquake rolled through Southern California, July 29, 2008.
Dozens of people evacuated from a clinic stand across the street, well away from the building, in the Wilshire District west of downtown Los Angeles after an earthquake, July 29, 2008.
Police tape surrounds debris that fell on a sidewalk after an earthquake on July 29, 2008, in Los Angeles.
Summer school students at St. Margaret's Episcopal School in San Juan Capistrano evacuate their classrooms after a strong earthquake struck Southern California, July 29, 2008.
A worker at Pomona City Hall boards up a window that was broken during an earthquake on July 29, 2008, in Pomona, California.