The earthquakes continued for hours until a heavy 4.5-magnitude quake rattled the Southern California city from a depth of over nine miles ...

The area is "prone to earthquake swarms," officials say.

The earthquake occurred yesterday at 8:12 pm, the U.S. Geological Survey reports. With an epicenter about 5 miles southeast ...

NEVADA COUNTY, CA - A preliminary 3.5 magnitude quake jolted near Truckee at midday on Friday, the U.S. Geological Survey ...

The Mendocino Triple Junction is the meeting point of three tectonic plates. Using data from tiny earthquakes, researchers at USGS, UC Davis and CU Boulder propose a new model for this seismic zone.

(FOX 5/KUSI) — In earthquakes country, information can be just as critical as preparedness — and for the past 20 years, the Unites States Geological Survey’s Earthquake Notification System has been ...