Hidden earthquake faults beneath Seattle may be more dangerous than expected

ScienceDaily
May 19, 2026, 10:00 am251 ptsTop
A hidden network of earthquake faults running beneath Seattle may be far more active than scientists realized. New research reveals that smaller “secondary” faults in the Seattle Fault Zone appear to rupture roughly every 350 years — much more often than the massive main fault that has long worried geologists.

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