Was that an earthquake you just felt or merely a big truck rumbling by? You don't have to wonder thanks to the U.S.

In California, where the next “Big One” is an always-looming threat, some lessons learned from the 1925 Santa Barbara quake ...

Alaska was jolted by a 7.3-magnitude earthquake on Wednesday afternoon. Tsunami information was not immediately available.

A 4.3-magnitude earthquake jolted a lake shoreline Friday, July 11, in Southern California, the U.S. Geological Survey reported. Then dozens of smaller quakes followed. The 6.5-mile-deep quake hit ...

A minor, 3.7-magnitude earthquake struck in Southern California on Thursday. It was followed by a larger, 4.3-magnitude quake nearby a few hours later, according to the United States Geological Survey ...

A preliminary 3.7 magnitude earthquake struck Wednesday morning off the coast of Northern California, according to the United States Geological Survey. The quake, centered in the Pacific Ocean about ...

A worldwide Android smartphone-based earthquake detection and early warning system can detect seismic activity in real time.

Hedge fund operators are buying insurance claims in an attempt to potentially profit from the $21 billion fund.

LOS ANGELES -- A powerful 7.1 earthquake shook Southern California, cracking buildings, breaking roads and causing power outages on Friday, just one day after a magnitude 6.4 hit the same general ...