An earthquake swarm in Northern California early Thursday was another round of recurring temblors in a seismically active ...

A 3.6-magnitude earthquake shook parts of Southern California, the U.S. Geological Survey reported. The about 10-mile deep quake hit about 6 miles southwest from Idyllwild in Riverside County shortly ...

Scientists are warning of a potentially catastrophic mega-tsunami that could strike parts of the US Pacific Coast, triggered ...

Southern Washington, northern Oregon, and northern California are the regions which are most vulnerable to flooding from a ...

A series of more than 100 earthquakes has hit Northern California, shaking up the Geysers geothermal steam field in Sonoma ...

Some earthquakes are followed by a larger earthquake, in which case the first quake would then be called a foreshock. For ...