It's the same area where a couple smaller quakes hit earlier Sunday. One was a magnitude 1.4 quake at 3:38 a.m., the other a magnitude 1.1 quake at 7:22 a.m.
There have been no reports of injuries or damage.
CNS contributed to this report.
3.1 earthquake shakes Chino Hills area
CHINO HILLS, Calif. It was centered near Chino Hills on the L.A. and San Bernardino county line, about 5 miles east of Diamond Bar.
