Running for roughly 750 miles up the length of California, the San Andreas fault marks one of the most closely watched ...

The San Andreas Fault forms the grinding boundary between two of the planet’s great tectonic plates, and long stretches of it ...

Add Yahoo as a preferred source to see more of our stories on Google. Tectonic stress building beneath Southern California could have far-reaching consequences for millions of residents from the ...

Cajon Pass is more than a busy mountain gateway. Its complex geology could help reshape the next major earthquake’s reach and intensity.

There is no easy explanation for how the San Andreas fault, responsible for some of America’s most powerful earthquakes, has produced so few in the last century. But it is clear that the quiet period ...

Add Yahoo as a preferred source to see more of our stories on Google. Tectonic stress along Southern California's San Andreas and San Jacinto fault systems has reached — and in some areas exceeded — ...

Last Monday, April 14, an earthquake caught many people’s attention in Southern California. It was centered near the town of Julian about 35 miles inland from San Diego and triggered the USGS ...

California is shifting about 45–50 millimeters per year as tectonic plates slide past each other along major faults. New research shows Southern California fault systems are highly strained after more ...