A 4.1-magnitude earthquake near Ontario shook parts of Southern California on Sunday morning, Oct. 6, the U.S Geological Survey reported. The quake, at 3:51 a.m., was centered at 4.3 miles southeast of Ontario, 4.5 miles north, northwest of Eastvale, 4.9 miles north, northwest of Jurupa Valley and 5.6 miles south of Rancho Cucamonga , according to a preliminary report by the USGS. It occurred at a depth of about 3 miles. Light shaking was recorded throughout the Inland Valley, as well as San Bernardino, Riverside and Orange County and parts of the Los Angeles area. The quake was followed by eight aftershocks as of 7:25 a.m., including the strongest one, a 2.5-magnitude temblor at 4:04 a.m., a senior data analyst at the Caltech Seismology Laboratory said. “More aftershocks may be expected in the next few days,” Zackary Newman, the analyst, wrote in his report. “The largest expected is approximately 1 magnitude unit smaller than the mainshock. “There is a small chance (about 5%) that a larger quake could occur, with the likelihood decreasing over time,” he wrote. No injuries or damage were reported on Sunday morning. On Tuesday, Oct. 1, a magnitude-3.5 quake struck nearby; it was centered two miles southeast of Ontario. This map shows where the 4.1-magnitude quake was felt on Sunday morning, Oct. 6. (USGS) Related Articles Crime and Public Safety | Retired airline captain vindicated in baffling Redlands DUI arrest Crime and Public Safety | 1st Riverside cooling center for people and their pets will be open through the weekend Crime and Public Safety | 10 wolf hybrids rescued in Aguanga head to exotic pet compound Crime and Public Safety | Why the rise in students’ school threats alarms Southern California law enforcement Crime and Public Safety | Former L.A. County Sheriff Jim McDonnell named LAPD’s new chief