Stress on San Andreas Fault reaches highest levels in 1,000 years as scientists await next ‘major rupture’
Researchers say stress on the San Andreas and San Jacinto faults has reached the highest levels in 1,000 years, raising the risk of a larger rupture.
- A new study published in the Journal of Geophysical Research: Solid Earth reveals that tectonic stress along the San Andreas and San Jacinto faults in Southern California has reached its highest level in 1,000 years.
- More than 160 years have elapsed since the region's last major rupture, leaving the system in a "critically loaded state" that scientists warn could precede a massive, combined seismic event.
- The Cajon Pass acts as an "earthquake gate" that may either connect or separate the two faults during a rupture, potentially triggering a joint event releasing significantly more energy than an independent quake.
- Such a joint rupture threatens heavily populated corridors including Los Angeles, San Bernardino, Riverside, and the Coachella Valley, where researchers emphasize the need for improved infrastructure planning and emergency preparedness.
- Lead author Liliane Burkhard emphasized this is "not a prediction of when an earthquake will happen," but rather a tool to help scientists better understand simultaneous rupture risks facing millions of people globally.
72 Articles
72 Articles
Scientists discover an earthquake gate as California faults reach their highest stress levels in 1,000 years
A new study suggests Southern California's major fault system is more stressed than at any point in the last 1,000 years. Researchers found that the Cajon Pass, where the San Andreas and San Jacinto faults meet, could act as an “earthquake gate” that determines whether a future rupture spreads across both faults. Current conditions resemble those that preceded some of the region’s largest historical earthquakes.
Southern California could face a seismic scenario of great magnitude in the future. New scientific research concluded that the systems of the San Andrés and San Jacinto faults currently present the highest levels of tectonic stress recorded in the last millennium, a situation that could favor the occurrence of the dreaded “Big One”, the name popularly known for the eventual great earthquake in California.
California’s tectonic systems at highest levels of stress in 1,000 years
COACHELLA VALLEY, Calif. (KESQ) — A new study is drawing attention to earthquake risks across the Coachella Valley, finding that Southern California's San Andreas and San Jacinto fault systems are under some of the highest levels of stress seen in the past 1,000 years. The research, published in the Journal of Geophysical Research: Solid Earth, found that stress has continued to build along the faults because of the long time since the last majo…
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