California Fault Stress Hits 1,000-Year High, Study Finds
· Science · United States
A simulation indicates stress on Southern California's San Andreas and San Jacinto faults has reached some of the highest levels in 1,000 years. The Cajon Pass junction, where both faults are highly stressed at once, may be increasingly primed for a rupture crossing both systems.
Why it matters：Elevated stress at a fault junction informs seismic hazard assessment and preparedness for one of the most populated regions in the United States.
Key points
- Simulation covers 1,000 years of fault stress
- Both San Andreas and San Jacinto faults are highly stressed simultaneously
- Cajon Pass junction flagged as a possible crossing-rupture point
Sources (original reporting)
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