The USGS has estimated that a major magnitude 7.8 earthquake on the San Andreas fault could kill about 1,800 people, while a 7.5 magnitude quake on the Puente Hills thrust fault could kill as many ...

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.

Though these quakes happened on the San Andreas fault line, San Bernadino is near a number of fault lines running through California that frequently cause earthquakes, including the Arrowhead ...

Monday’s magnitude 4.4 quake that rattled Southern California is believed to have struck on a well-known and dangerous fault system known as the Puente Hills thrust fault system.