A light, 4.1-magnitude earthquake struck in Southern California ... map. An aftershock is usually a smaller earthquake that follows a larger one in the same general area. Aftershocks are typically ...

However, the USGS deleted the alert from its live map about two hours later and told ... which is one of the most significant and active fault lines in California. There are heightened concerns about ...

Did you feel it? A 3.9 magnitude earthquake struck near Dublin Monday night, according to the U.S. Geological Survey.

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

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 ...

California is overdue for a major earthquake ... 2015 to drill new wastewater wells or rework existing ones near faults in Los Angeles, Santa Barbara, Kern and other counties (see map below). A Center ...

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 ...