At least two strong earthquakes struck off the Northern California and Oregon coasts early Wednesday, including a magnitude 5.7 quake. No Tsunami Warnings were issued.

A 2.7 magnitude micro earthquake occurred near Brawley, California on Saturday evening, with the shake being felt in nearby areas such as Westmorland, Imperial, Calipatria and El Centro.

Earthquakes usually occur along fracture zones in Earth's crust, where large tectonic plates slide past one another and become locked. Stress builds up over long periods and is suddenly released in the form of an earthquake.

A 3.6 magnitude earthquake centered in Alamo on Sunday morning was also felt in surrounding cities, officials said. A quake registering 1.7 occurred  about a half-hour later in the same area, officials said.

SAN DIEGO (KSWB/KUSI) – Nearly 200,000 people in Southern California felt shaking as hundreds of earthquakes rattled the Imperial County desert over the weekend. The California Governor’s Office of Emergency Services (CAL OES) is working with local ...

A 3.6 magnitude earthquake was reported a little over a mile southwest of Alamo in the East Bay Sunday morning just before 8:40 a.m. Shaking was reportedly felt as far as Oakland and