A fault line does not keep a calendar, no matter how often people ask it to. That simple limitation shapes nearly everything scientists say about the San Andreas Fault. Researchers can measure strain, ...

The ground beneath the United States is never truly still. S. could experience potentially damaging earthquakes and intense ground shaking, putting hundreds of millions of people at risk, according to ...

Drop. Cover. Hold on. That’s the three-part jingle every Californian learns to stay safe in earthquake country. Scientists forecast a more than 99% chance that earthquakes of 6.7 magnitude or larger ...