A pair of small earthquakes shook Southern California Saturday morning, with epicenters in Ontario.
The quakes, measuring 3.5 and 3.9 magnitude, occurred about a half-hour apart. The tremors were felt as far away as Los Angeles, Orange County and northern San Diego County, according to crowdsourced reports sent to the U.S. Geological Survey.
“Mild” shaking, defined by the modified Mercalli intensity scale, was felt near the epicenter, which included Ontario International Airport, the USGS said. The mild shaking is enough to shake windows and dishes and can cause stationary cars to shake noticeably.
“Weak” tremors could be felt as far away as Los Angeles, the San Gabriel Valley, Long Beach, Orange County, Riverside and San Bernardino.
The first earthquake struck near Archibald Avenue and Brookside Street at 10:05 a.m. Saturday, and was followed by a larger quake about three-fifths of a mile to the northeast, with an epicenter at Interstate 60 and South Oak Hill Drive.
Ontario Police said there were no immediate reports of damage.
In Rowland Heights, a resident felt his office shake violently for a few seconds. The shaking was so violent that he initially thought someone might have crashed into the house.
