Two earthquakes with preliminary magnitudes of 3.5 and 3.9 respectively jolted California in its southern region on Saturday, and their impacts were felt by millions of people across the region.
According to the U.S. Geological Survey, the first earthquake struck 10:05 a.m. with an epicenter 4.3 miles southeast of Ontario.
The second, stronger quake was reported at 10:34 a.m. with an epicenter 4.4 miles southeast of Ontario, close to the first spot.As of 10:40 a.m., there were no reports of injuries or damages.
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Several aftershocks were reported in the same area throughout the morning, each with magnitudes less than 2.5.
Thousands of earthquakes are recorded in California yearly, but the vast majority are extremely minor.
Several hundred reach a magnitude of 3.0, and only about 15 to 20 are greater than magnitude 4.0, according to the USGS.