Along the remote coast where the San Andreas Fault meets the Cascadia subduction zone, earthquakes too small for humans to feel are sketching out a hidden map of danger. By tracking these tiny tremors ...

Add Yahoo as a preferred source to see more of our stories on Google. Tiny quakes help scientists map hidden faults where the San Andreas meets Cascadia, reshaping quake hazard estimates. (CREDIT: ...

If the Cascadia subduction zone and the San Andreas fault can act in concert, then seismic models must consider the possibility of coupled behavior. That could mean a higher short-term risk of back-to ...

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, ...

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 ...

Julia Shumway / Oregon Capital Chronicle The so-called “Big One” or Cascadia Subduction Zone earthquake expected to trigger disruptive quakes throughout the West Coast could cause more damage than ...

The pressure keeps building below the Earth’s surface off the coast of the Pacific Northwest, and a multi-layered disaster could strike at any time. A huge earthquake is brewing along the Cascadia ...

A hidden chunk of an ancient tectonic plate is stuck to the Pacific Ocean floor and sliding under North America, complicating earthquake risk at the Cascadia subduction zone. When you purchase through ...

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 ...

Northern California’s coast keeps you on alert, even on quiet days. Offshore, three tectonic plates meet near Humboldt County at the Mendocino Triple Junction. It is where the San Andreas fault system ...

The so-called “Big One” or Cascadia Subduction Zone earthquake expected to trigger disruptive quakes throughout the West Coast could cause more damage than previously estimated if it sets off quakes ...