A magnitude 3.1 earthquake was reported in Ontario Saturday at 3:49 p.m., according to the U.S. Geological Survey.
The quake was 4.6 miles from Upland, 5.1 miles from Chino and 5.9 miles from Rancho Cucamonga.
It occured at a depth of about 2.9 miles, the USGS reported.
If you were in the affected area, consider reporting what you felt to the USGS.
No further details were available.