These are two very different fault systems, but the sediment record suggests that in the past, at least three San Andreas ...

One of the most dangerous faults in the United States, the Cascadia Subduction Zone, may be able to trigger an earthquake on the San Andreas Fault, a new study says. But some scientists want more ...

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

The San Joaquin fault runs along the base of the Coastals from Newman to east of Tracy. The third is the Corral Hollow fault ...

The relationship between the sites means an earthquake in one zone can trigger an earthquake in the other in a phenomenon ...

A mega-earthquake might be triggered by two volatile faults, striking in unison, with one quake nudging the other into ...

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

Scientists at Oregon State University say there's new evidence that two of the best-known earthquake fault lines on the West Coast are in sync and that has the potential for a major disaster. One of ...

Geologic clues reveal a hidden link between two major faults. A Cascadia quake might set the San Andreas in motion soon after ...

Scientists have uncovered evidence that megaquakes in the Pacific Northwest might trigger California’s San Andreas Fault. A research ship’s navigational error revealed paired sediment layers showing ...

They are two of the West Coast's most destructive generators of huge quakes: the San Andreas fault and the Cascadia subduction zone. What if they caused back-to-back disasters?