The Rialto Fire Department reported that a series of small earthquakes shook the northwestern portion of the city Thursday morning.

A magnitude 4.4 earthquake hit Southern California on Thursday morning, according to the U.S. Geological Society.

A preliminary magnitude-4.3 earthquake in the San Bernardino area produced shaking that was felt over widespread parts of Southern California. The quake, reported at about 9:30 a.m., was one of four of magnitude 2.