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

A fault line that could unleash a major earthquake is not where scientists thought it was. New research found the Concord Fault is about a quarter mile west of where it was originally mapped.

Scientists discover enormous pockets of salty brine beneath the Pacific Ocean, key to understanding periodic underwater ...

In the heart of California, the San Andreas Fault lies like a ticking time bomb, silently building pressure for over a century. Stretching more than 1,200 kilometers, this massive fault marks the ...