About 5% to 10% of all California earthquakes are followed by a larger one within a week, and the probability of a larger quake depends on how much aftershock activity there is, according to the USGS.

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 ...

An earthquake and dozens of aftershocks rattled Southern Californians starting on Tuesday night and continuing into Wednesday morning. Could a bigger one be on the way? As a general rule, the risk ...

An earthquake rattled parts of Southern California—including the Los Angeles metropolitan area—on Tuesday night, followed by a series of smaller aftershocks, although no major damage has been ...

SAN BERNARDINO, Calif. – A pair of earthquakes struck just minutes apart near San Bernardino, California, on Monday morning. The first earthquake, a magnitude 3.5, hit just before 9:45 a.m ...

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

A magnitude 4.3 earthquake struck Southern California on Friday evening, according to the US Geological Survey. The quake was widely felt in the Los Angeles area and surrounding cities including ...

Tuesday's earthquake is the most recent shaker to hit California. On Aug. 2, a 3.3-magnitude earthquake centered on the west side of the Salton Sea was felt in parts of Southern California. On ...