The two earthquakes, which occurred at magnitudes of 3.5 and 3.4, were separated by six hours and centered just miles outside of Fontana, according to the USGS.

An earthquake with a preliminary magnitude of 3.5 struck the Inland Empire on Saturday, which was felt by residents across a large swath of the region. The quake, reported at 2:17 p.m. according to the United States Geological Survey,

A magnitude 3.4 earthquake hit the Fontana area Saturday, the U.S. Geological Survey said. The Inland Empire quake was centered just under five miles northwest of Fontana, the agency said. It happened at a depth of roughly 2½ miles at 8:17 p.