A pair of modest earthquakes rattled Southern California on Saturday morning, with epicenters in Ontario.
The earthquakes, of magnitude 3.5 and 3.9, occurred within about half an hour of each other. Tremors were felt as far away as the city of Los Angeles, Orange County and northern San Diego County, according to crowdsourced reports sent to the US Geological Survey.
“Light” shaking, as defined by the modified Mercalli intensity scale, was felt near the epicenter, which included Ontario International Airport, the USGS said. Light shaking is enough to disturb windows and crockery and can noticeably rock standing cars.
“Weak” shaking may have been felt as far away as Los Angeles, the San Gabriel Valley, Long Beach, Orange County, Riverside and San Bernardino.
The first quake struck near Archibald Avenue and Brookside Street at 10:05 a.m. Saturday and was followed by the larger quake about three-fifths of a mile to the northeast, with an epicenter at the 60 Freeway and South Oak Hill Drive.
The Ontario Police Department said there were no immediate reports of injuries.
In Rowland Heights, a resident felt his desk shake violently for a few seconds. The tremors were so jarring that at first he thought someone might have crashed into the house.