4.0 magnitude earthquake strikes Orange County, felt in San Diego

SAN DIEGO - An early Thursday morning earthquake in eastern Orange County was felt in San Diego.

The quake struck about 8 miles northeast of Trabuco Canyon, located in the foothills of the Santa Ana Mountains, at 2:09 a.m., the United States Geological Survey reported.

The shaking was felt as far away as Lake Hughes, Barstow and San Diego, viewers told KTLA.

The quake was near the Elsinore fault but not on it, Dr. Lucy Jones tweeted. 

Jeff P. from Corona said there was a loud rumbling followed by a huge jolt when the quake struck.

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No damage or injuries were immediately reported.