U.S. Geological Survey Map shows the location of the largest earthquake.

A 3.5 magnitude earthquake in Riverside County that shook areas as far away as Valley Center Wednesday was followed by a smaller quake about six hours later.

The first quake hit around 12:15 a.m. at a depth of about 10 miles, according to the U.S. Geological Survey.

Its epicenter was about three miles southwest of Cabazon in Riverside County, six miles southeast of Banning, 16 miles west-northwest of Palm Springs and 78 miles north-northeast of San Diego, according to a computer-generated report.

Around 6:30 a.m., a magnitude 3 temblor struck at a depth of around 5 miles. Its epicenter was 12 miles east-northeast of Thousand Palms, 14 miles north-northeast of Indian Wells and 94 miles northeast of San Diego, according to the USGS.

No damage was reported from either quake.

— From Staff and Wire Reports

Chris Jennewein is Editor & Publisher of Times of San Diego.