THOUSAND PALMS, Calif. -

A 5.1 magnitude earthquake rattled Southern California Friday evening at 9:11 p.m.

The temblor was originally recorded as a 5.4 magnitude but was later downgraded to a 5.1.

It was centered near Brea, about 20 miles southeast of downtown Los Angeles, but was felt in Riverside, Coachella, San Diego, and Thousand Palms.

In the CBS Local 2/Newchannel 3 newsroom, employees felt a jolt, then a rolling for about 5 seconds.  Light fixtures swayed.

The Los Angeles County Fire Department is receiving reports of gas leaks in the Rowland Heights area after the earthquake that struck near La Habra, says department supervisor Ed Pickett. The Los Angeles Police Department and Los Angeles and Orange county sheriff's departments have not received immediate reports of damage or injuries. A lieutenant at the Orange County sheriff's office in Silverado Canyon said the shaking lasted nearly 30 seconds.

Aftershocks measuring 3.4 and 3.6 followed the initial quake.