For generations, scientists believed that the West Coast’s two great earthquake engines — the Cascadia subduction zone and ...

Accidental landing of a research vessel in the San Andreas zone revealed the repeating patterns tribuldite in its core.

Down in California, the San Andreas Fault marks the boundary where the North American and Pacific plates are sliding past ...

A Cascadia subduction zone earthquake is coming for the Pacific Northwest, and when it hits, scientists now believe, it could cause the San Andreas fault in California to go off.

Although Californians are relatively familiar with the San Andreas Fault, the Cascadia Subduction Zone is in many ways more dangerous. That fault, where the Juan de Fuca Plate is subsiding underneath ...

San Andreas, Cascadia faults could combine to produce back-to-back earthquake disasters, new research suggests – Nation and ...

A specific type of earthquake that can cause particularly intense shaking is more common than previously believed, some ...

A future mega-earthquake in the Pacific Northwest could lead to the “Big One” along the San Andreas fault in California—or vice versa.

Scientists are raising the alarm about a potential seismic catastrophe on the West Coast of North America. Recent studies ...

Samples from the seafloor reveal evidence of several earthquakes along the West Coast’s two major fault zones happening in ...

LONG BEACH, Calif. (KABC) -- During an earthquake study conference in Long Beach, a local expert said California's infamous San Andreas fault is due for a massive ...

One of the most dangerous faults in the United States, the Cascadia Subduction Zone, may be able to trigger an earthquake on ...