Nobody knows the exact day it will happen. It could be tomorrow, or decades from now. But one thing is certain. The San ...

A fragment of a long-lost tectonic plate is sliding under the North American continent in the southern part of the Cascadia subduction zone, scientists have discovered. This leftover plate fragment ...

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 ...

Scientists say the San Andreas and San Jacinto faults are more stressed than at any time in 1,000 years, raising questions about future California quakes.

The volatile seismic zone along the roughly 750-mile (1,200-km) San Andreas Fault and the smaller San Jacinto Fault are now "critically stressed" – reaching a 1,000-year high level of pressure – ...

When the tectonic subduction zone beneath the Pacific Northwest moves, it does so in dramatic fashion. Not only is ground shaking from a magnitude 9+ earthquake incredibly destructive, the event ...

California isn’t exactly where it used to be. Here’s how earthquakes have gradually reshaped the state over time.

Scientists say there's new evidence that two of the best-known earthquake fault lines on the West Coast are in sync. SAN FRANCISCO -- Scientists say there's new evidence that two of the best-known ...

Stress on the San Andreas Fault System has reached a 1,000-year high, according to new research from the University of Hawaii. Higher stress on a fault means the pressure that causes earthquakes is ...

For more than a century, stress was mounting across a section of an 800-mile-long crack in Myanmar. Known as the Sagaing Fault, the crack ran between the Indian and Eurasian tectonic plates, which ...