California has been rocked by at least nine earthquakes since Thursday, raising fears that the "Big One" could be near.

The ground keeps shaking in Southern California as the coastal city of Malibu was hit by two earthquakes on Valentine's Day ...

Researchers at Stanford University developed a new method to measure water levels in the state’s aquifers using readily ...

Previous reports from the USGS have noted the danger posed by the Hayward fault. Though less of a household name than the San Andreas fault ... 4.0 occur each year in California and Nevada ...

As the downpour intensified Thursday, the National Weather Service issued flash flood and severe thunderstorm warnings for a ...

Southern California reported 1 to 3 inches (2.5 to 7 centimeters) of rain in coastal areas and valleys and 3 to 6 inches (7.6 to 15.2 centimeters) across the coastal slopes on Thursday, said Mike ...

In some areas, hazards have surged. Buildings in the highest hazard zones will be subject to the strictest fire-resiliency ...

LOS ANGELES (KABC) -- A major storm system moved through into Southern California from Thursday to Friday, dumping several inches of rain in some areas. Record rainfall was reported in downtown ...

The immigration numbers in Southern California – legal and illegal – outstrip the nation. About 29% of all people living in Los Angeles, Orange, Riverside and San Bernardino counties – more ...

Photos captured the impact of the atmospheric river that triggered mudslides and significant floods in Southern California this week. Evacuation warnings were issued for vulnerable locations ...

Evacuation warnings or orders are in effect for communities near fire-scarred areas in Southern California most at risk of debris flows and mudslides. Portions of San Bernardino, Orange ...