A 4.0 magnitude earthquake struck near Ontario early Sunday morning, jolting many Southern Californians awake unexpectedly.

An earthquake shook Southern California's Inland Empire early Sunday morning.The magnitude of the earthquake was 4.0, which shook buildings and homes, causing fear and panic among the residents. According to the US Geological Survey ,

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. Sunday's 3:51 a.

An earthquake with a magnitude of 4.0 rattled the Inland Empire early Sunday morning, shaking homes and businesses and waking residents across the region. According to the U.S. Geological Survey, the quake struck at 3:41 a.

The earthquake could be felt throughout the Inland Valley, as well as San Bernardino, Riverside and Orange County and parts of the Los Angeles area. It was followed by a 2.5-magnitude aftershock at 4:04 a.