Three huge tectonic plates meet at the Mendocino triple junction off the coast of northern California, and a new study ...

A Pattern That Crosses Fault Lines What emerged was an extraordinary pattern: over the last 3,100 years, many major earthquake layers in southern Cascadia aligned in time with those from the northern ...

It was a groundbreaking discovery. Scientists have found previously concealed fault lines along California’s north coast, sparking concerns that we could be drastically underestimating the earthquake ...

Imagine a scenario where the Pacific Northwest gets pummeled by a magnitude nine earthquake, only to have California's most ...

The Carrizo Plain in eastern San Luis Obispo County contains the most strikingly graphic portion of the San Andreas Fault. Sediment cores recovered from the Pacific seafloor suggest that megathrust ...

SAN FRANCISCO -- Scientists 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. A new study by ...

They are two of the West Coast’s most destructive generators of huge earthquakes: The San Andreas fault in California and the Cascadia subduction zone offshore of California’s North Coast, Oregon, ...

For generations, scientists believed that the West Coast’s two great earthquake engines — the Cascadia subduction zone and the San Andreas fault — operated on separate geologic stages. One dives, one ...