A magnitude 4.1 earthquake rattled Southern California early Sunday morning.

The quake struck 3 miles southeast of Ontario at 3:51 am.

Residents in Los Angeles, Riverside and Orange County felt shaking.

No reports of damage or injury.

The latest temblor comes amid a record-breaking year for 4.0+ magnitude quakes in California igniting fears of the "big one."

The "Big One" refers to a large earthquake along the San Andreas fault. Seismologists say California is overdue for a large seismic event.

"The average number of magnitude 4 and above earthquakes for this region is about eight per year, U.S. Geological Survey (USGS) seismologist Lucy Jones said in a televised Q&A following the earthquake," the Daily Mail reported.

"So far, we've had 14 in Southern California – the largest previous year was 13," Dr. Lucy Jones said.

A magnitude 4.7 quake struck Malibu last month.