AI Generated Image
Southern California earthquake faults hit 1,000-year stress peak
New York Post • • science
Key Points:
- Stress levels beneath Southern California's San Andreas and San Jacinto fault systems have reached their highest in at least 1,000 years, raising concerns about the potential approach of a major earthquake known as the "Big One."
- Researchers used geological evidence, radiocarbon dating, historical records, and computer simulations to reconstruct a millennium of earthquake activity and track stress accumulation along these faults.
- The Cajon Pass area, where the two faults converge, is critical as it may determine whether a rupture remains localized or spreads across multiple fault systems, potentially impacting large communities including Los Angeles and the Coachella Valley.
- Increasingly similar stress levels on both faults may facilitate an earthquake jumping between the San Andreas and San Jacinto systems, heightening the risk of a widespread rupture.
- With millions more residents and extensive infrastructure now in place compared to the last major 7.9 magnitude Fort Tejon earthquake nearly 170 years ago, Southern California faces significant risk from a potential major seismic event.
