A preliminary 3.1 magnitude quake was reported near Petrolia Saturday morning, according to the U.S. Geological Survey.

A series of earthquakes between 2.5 and 3.8 magnitude struck southeast San Ramon beginning at 9:38 a.m. Sunday, according to the U.S. Geological Survey. The first quake, magnitude 3.8, rattled the ...

HUMBOLDT COUNTY, CA - According to the U.S. Geological Survey, a preliminary 2.2 magnitude quake occurred close to Redway Friday morning. A tremor shook the region at 3:57 a.m. The earthquake's ...

SONOMA COUNTY, CA - A preliminary 2.5 magnitude quake was recorded close to The Geysers Saturday night, according to the U.S. Geological Survey. It was reported that a tremor shook the region at 11:19 ...

IMPERIAL COUNTY, CA - A preliminary 2.4 magnitude quake was registered near Calipatria on Saturday around midnight, the U.S. Geological Survey reported. A tremor shook the region at 12:08 a.m. The ...

VENTURA COUNTY, CA - A 3.2 magnitude quake was registered close to Santa Paula Wednesday morning, according to the U.S. Geological Survey. A tremor rattled the area at 3:21 a.m. The earthquake's ...

Scientists are warning that underexplored "supershear" earthquakes could have serious impacts in California, particularly near the infamous San Andreas Fault. "The San Andreas is the perfect setting ...

SONOMA COUNTY, CA - the U.S. Geological Survey reported that a preliminary 2.3 magnitude quake struck close to The Geysers Sunday evening. The tremor struck at 7:47 p.m., with its epicenter situated ...

INYO COUNTY, CA - A preliminary 2.4 magnitude quake was detected near Wilkerson Tuesday afternoon, the U.S. Geological Survey reported. The tremor shook at 2:48 p.m., with its epicenter situated ...

This topsy-turvy guide to Southern California earthquakes details the history of earthquakes in the Coachella Valley and other facts to know.

MONTEREY COUNTY, CA - A preliminary 2.8 magnitude quake was registered near Lopez Point Saturday evening, the U.S. Geological Survey reported. The tremor shook at 7:21 p.m., with its epicenter ...