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After:
All it really felt like here was the ground shaking like Jello. The some details are below.
LOS ANGELES - A strong earthquake shook Southern California on Tuesday, causing buildings to sway and triggering some precautionary evacuations. There were no immediate reports of damage or injuries. The jolt was felt from Los Angeles to San Diego, across the border in Tijuana, Mexico and slightly in Las Vegas.
The 11:42 a.m. quake was initially estimated at 5.8 by the U.S. Geological Survey but was revised downward to 5.4. More than a dozen aftershocks quickly followed, the largest estimated at magnitude-3.8.
The quake was centered 29 miles southeast of downtown Los Angeles near the San Bernardino County city of Chino Hills, and was estimated to be about 8 miles below the earth's surface.
California is one of the world's most seismically active regions. More than 300 faults crisscross the state, which sits atop two of Earth's major tectonic plates, the Pacific and North American plates. About 10,000 quakes each year rattle Southern California alone, although most of them are too small to be felt.