A series of moderate earthquakes rattled the waters off Northern California and southern Oregon early Thursday near the ...

Earthquakes usually occur along fracture zones in Earth's crust, where large tectonic plates slide past one another and ...

A 4.1-magnitude earthquake hit Southern California Monday afternoon, according to the U.S. Geological Survey. The quake ...

Nearly 200,000 people in Southern California felt shaking after hundreds of earthquakes rattled the Imperial County desert over the weekend, with the strongest earthquake reported as a magnitude 4.7.

Dozens of earthquakes rattled parts of California on Saturday and into Sunday in what experts call an earthquake swarm, with many centered near Brawley, according to the U.S. Geological Survey.

The seismic activity has ranged from very low magnitude up to 4.7 magnitude in strength, according to the USGS data.