RIVERSIDE COUNTY, CA - A preliminary 2.1 magnitude quake occurred close to Anza around midday Monday, according to the U.S.

RIVERSIDE COUNTY, CA - A preliminary 2.1 magnitude quake occurred near Anza on Friday morning, the U.S. Geological Survey ...

A 3.4 magnitude earthquake struck near Ontario in Southern California, with light tremors felt in Irvine, Anaheim, Menifee, Riverside and nearby areas.

Researchers at a public university in California say they have developed a way to identify the most likely locations of some ...

The earthquake struck nearly four miles southeast of Ontario at 5:37 a.m., according to the United States Geological Survey.

A magnitude-3.2 earthquake was reported Tuesday morning that caused shaking in parts of Riverside and San Bernardino counties. Shaking from the earthquake at 9:36 a.m. near Loma Linda was reported in ...

Researchers used GPS data to measure where energy was building up in faults, correctly predicting where an 8.8 magnitude ...

UC Riverside scientists have developed a way to identify where Earth's biggest earthquakes are most likely to occur, offering ...