A preliminary magnitude 4.0 earthquake hit the North Bay Sunday afternoon, according to the United States Geological Survey.

An earthquake of 3.7 preliminary magnitude was reported Tuesday afternoon near the Channel Islands off Ventura County, the ...

An earthquake shook in Sonoma County Saturday afternoon, according to the United States Geological Survey (USGS). A ...

A preliminary XX magnitude earthquake struck near XX, according to the United States Geological Survey. The quake, which hit ...

A preliminary 4.1 magnitude earthquake struck Sunday afternoon near Glen Ellen in Sonoma County, according to the United ...

In August, the United States Geological Survey (USGS) released its most extensive geological map to date. It's called The Cooperative National Geologic Map, and it provides an interactive look at the ...

A strong, 6.7-magnitude earthquake struck in the North Pacific Ocean on Friday, according to the United States Geological Survey. The temblor happened at 11:44 a.m. Japan time about 71 miles northeast ...

A minor, 3.1-magnitude earthquake struck in Southern California on Thursday, according to the United States Geological Survey ...

A new lawsuit seeks to overturn the recent approval of an exploratory drilling program in the National Petroleum ...