Southern Concord Fault found to be slowly shifting, changing seismic hazard maps for Bay Area suburbs
Creep measurements along the Concord Fault show consistent right-lateral motion of 2–3 mm/year (0.08–0.12 inches/year), prompting a shift in the official fault trace by up to 500 m (1 640 feet) and placing urban homes and infrastructure directly within a newly defined hazard zone.










