Moderate quake strikes south San Diego County

SANTA ANA, CA The U.S. Geological Survey says a 4.5 magnitude quake hit at 2:12 a.m. Saturday, about 16 miles west southwest of Calexico. The USGS reports that residents in nearly every San Diego County zip code reported feeling it.

No damage or injuries have been reported.

Several quakes above 3.0 hit later in the day, including a 3.7 magnitude shock at 11:47 a.m.

Earlier in the day, a computer glitch indicated a second 4.5 shaker occurred, but a spokeswoman at the California Institute of Technology said that was a false reading.