The quake was mostly felt in the San Bernardino County cities and areas of Ontario, Rancho Cucamonga, Eastvale and Chino. Additionally, the shaking was felt in some portions of San Bernardino, Riverside, Orange and Los Angeles counties.

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.

A 3.5-magnitude earthquake shook the Southern California area, the U.S. Geological Survey reported. The about 3-mile deep quake hit a little more than a mile from Ontario, about a 40-mile drive east from Los Angeles, at 12:56 p.m. Tuesday, Oct. 1, according to the USGS.

A 3.5-magnitude earthquake struck near Ontario, California; no significant damage or injuries have been reported.

A 3.6-magnitude earthquake struck Northern California near the unincorporated community of Walker in Mono County on Saturday morning, according to the U.S. Geological Survey. The earthquake hit around 8:30 a.m. about 105 miles east of Sacramento, and 37 miles southeast of South Lake Tahoe in El Dorado County.

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

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.