A preliminary 4.0-magnitude earthquake struck near Ontario this morning, according to the U.S. Geological Survey. The quake hit at 3:51 a.m. Sunday with an epicenter of 2.8 miles northwest of Ontario.

A 3.5-magnitude earthquake struck near Ontario this afternoon, according to the U.S. Geological Survey (USGS). The quake hit at 12:56 p.m. with an epicenter 1.24 miles southeast of Ontario.

Two small earthquakes occurred near Ontario Saturday morning. At 10:05 a.m., a magnitude 3.5 earthquake struck 3.1 miles southeast of the city, followed by a 3.9 magnitude quake at 10:34 a.m. that ...

Photo by Robert Alexander/Getty Images Two small earthquakes have hit near Ontario ... a.m., a 2.6 magnitude aftershock struck about two miles southeast of Ontario, according to ABC 7.

The epicenter of the earthquake, which struck at 12:56 p.m., was less than a mile south of Ontario International Airport, near the corner of Francis Street and Carlos Avenue. An earlier estimate ...

A magnitude 4 earthquake rattled Southern California before dawn Sunday morning — the strongest in a series of modest earthquakes to strike near the Ontario International Airport in the last month.

Two earthquakes struck near Ontario within 30 minutes this, with magnitudes of 3.5 and 3.9, respectively, according to the U.S. Geological Survey. When: The first quake struck at around 10:05 a.m ...

Two earthquakes struck near Ontario within 30 minutes on Saturday morning, with a magnitude of 3.5 and 3.9, respectively, according to the U.S. Geological Survey. They were the largest in a series ...