New Mapping Reveals Cascadia Fault's Complex Structure and Heightened Risks

The first comprehensive survey of the Cascadia Subduction Zone shows segmented fault lines, raising concerns about potential megaquakes and tsunamis.

Researchers have mapped over 550 miles of the Cascadia Subduction Zone, revealing four distinct segments.
The data indicates that the fault's complexity could lead to independent or simultaneous ruptures, affecting earthquake magnitude and impact.
The segment off Washington state and Vancouver Island is identified as the most dangerous due to its smoothness and shallow angle.
Experts warn that the Pacific Northwest remains underprepared for a potential magnitude 9 earthquake and resulting tsunamis.
The new findings will help improve earthquake and tsunami models, informing building codes and emergency planning.