A 2.9 earthquake also struck near Petrolia on Thursday at 11:40 a.m. ET with a depth of over 11 miles, the USGS reported. Internet reacts to Hayward earthquakes ...

Two more earthquakes struck less than six hours earlier slightly farther off the coast of Petrolia, roughly 250 miles north of the Hayward quakes. USGS says the first tremor hit at 2:06 am ET ...

Petrolia is about a 250-mile drive northwest from San Francisco. What to know about earthquakes Magnitude measures the energy released at the source of the earthquake, the U.S. Geological Survey says.

A late-night 5.2-magnitude earthquake shook the Pacific Ocean off the Northern California coastline, the U.S. Geological Survey reported. The 6-mile deep quake hit about 50 miles west of Petrolia ...

Petrolia is about a 250-mile drive northwest from San Francisco. What to know about earthquakes Magnitude measures the energy released at the source of the earthquake, the U.S. Geological Survey says.

A late-night 5.2-magnitude earthquake struck the Pacific Ocean west of Petrolia, in the vicinity of a 7.0-magnitude quake that hit Dec. 5.

Petrolia is about a 250-mile drive northwest from San Francisco. What to know about earthquakes Magnitude measures the energy released at the source of the earthquake, the U.S. Geological Survey says.

A late-night 5.2-magnitude earthquake struck the Pacific Ocean west of Petrolia, in the vicinity of a 7.0-magnitude quake that hit Dec. 5.

A late-night 5.2-magnitude earthquake struck the Pacific Ocean west of Petrolia, in the vicinity of a 7.0-magnitude quake that hit Dec. 5.

A late-night 5.2-magnitude earthquake struck the Pacific Ocean west of Petrolia, in the vicinity of a 7.0-magnitude quake that hit Dec. 5.