A new scientific warning has put California’s earthquake risk in sharp focus: supershear earthquakes—rare, high-speed ...

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

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

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

A new geological study suggests that a major earthquake in the Cascadia Subduction Zone could set off simultaneous shaking along California’s San Andreas ...

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.

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 ...

A massive Pacific Northwest earthquake could trigger a devastating second quake on California's San Andreas Fault, a new ...

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

Scientists compared sediment deposits created by underwater landslides from earthquakes within the Cascadia Subduction Zone ...

A big earthquake on the Hayward Fault could cause damage similar to deadly 1989 Loma Prieta quake, experts say. Thursday’s ...