According to the USGS, a 3.5-magnitude earthquake first hit Anza at 6:10 a.m. A 2.5-magnitude aftershock then hit at 6:18 a.m.
There are no immediate reports of damages or injuries.
Eyewitness News viewers in Temecula, Hemet and La Quinta Cove reported feeling the shaking. One viewer described it as "a quick rumble."