The quake hit at 4:33 p.m. and was centered about 13 km northeast of Julian, California, which is located a little more than an hour's drive from San Diego.
An additional 3.0 quake, believed to be an aftershock, was observed a few minutes later. At 7:57 p.m. a 3.8 quake was observed in the same area.
The earthquake registered on ABC7's Quake Cam. There was no immediate word on injuries or damage.