A map has shown an underwater fault line ... earthquake far worse than the "Big One" which hit California. The 600-mile fault ...

Did you feel it? A preliminary magnitude 3.0 earthquake struck near Dublin Tuesday afternoon, according to the U.S.

A USGS map shows where in California 2.5 magnitude (or greater) earthquakes were recorded in the last seven days—the San Andreas Fault is represented as a thick red line. A USGS map shows where ...

So when researchers detected strange seismic activity along a major California fault line this week, it prompted a familiar question: Is the Big One coming? On Thursday, scientists released a ...