A third earthquake struck California in less than six hours, this one rocking the city of Hayward near San Francisco and San Jose. Experts are now fearing the worst amid the uptick in seismic events

A 3.6-magnitude earthquake shook the Southern California area — the third tremor to hit the area Monday, Feb. 10, the U.S. Geological Survey reported. The about 5-mile deep quake hit about 3 miles northeast from San Bernardino just before 10 p.m., according to the USGS.

PETROLIA, Calif. – A magnitude 4.1 earthquake shook some Northern California communities early Tuesday morning. According to the U.S. Geological Survey (USGS), a magnitude 4.1 earthquake was reported about 13 miles west of Petrolia in the Pacific Ocean just after midnight Tuesday at a depth of about 12 miles.