A magnitude-4.0 earthquake rattled parts of Southern California early Sunday morning.  The quake near Ontario was reported ...
A 4.0 earthquake hit near Ontario, CA, felt across the region with minor aftershocks; no significant damage reported.
A 4.0 magnitude earthquake struck near Ontario early Sunday morning, jolting many Southern Californians awake unexpectedly.
More than a dozen aftershocks followed a 3.9-magnitude earthquake that struck the Inland ... had an epicenter about three miles southwest of Ontario, according to the U.S. Geological Survey.