Home / Disasters and Accidents / Cascadia Quake Could Trigger Devastating San Andreas Fault Tremors
Cascadia Quake Could Trigger Devastating San Andreas Fault Tremors
14 Oct, 2025
Summary
- Recent study finds Cascadia Subduction Zone quakes may trigger San Andreas Fault quakes
- Potential for simultaneous disasters in major West Coast cities like San Francisco, Portland, Seattle
- Oregon governor orders earthquake-proofing of new buildings and retrofitting of existing state buildings
According to a recent study published on September 29th, 2025, a major earthquake in the Cascadia Subduction Zone off the West Coast could trigger devastating tremors in the nearby San Andreas Fault system. The study, led by marine geologist Chris Goldfinger of Oregon State University, found that past Cascadia quakes have coincided with seismic activity in the San Andreas Fault, indicating the two fault systems are linked.
