Researchers warn stress building on San Andreas Fault may lead to massive earthquake

Environment
17 Jun 2026 • 5:17 AM MYT
The Independent
The Independent

The world’s most free-thinking newspaper

Researchers warn stress building on San Andreas Fault may lead to massive earthquake

  • University of Hawaiʻi researchers warn that California's San Andreas Fault has reached its highest stress level in 1,000 years.
  • The intertwined San Jacinto Fault is also in a critically loaded state, with both fault systems capable of a large, simultaneous rupture.
  • The Cajon Pass may act as an 'earthquake gate,' potentially allowing a combined rupture of both faults, threatening millions in cities like Los Angeles.
  • Researchers used physics-based computer modeling and 1,000 years of earthquake data to simulate the stress, though earthquake prediction is not yet possible.
  • The findings are crucial for emergency preparation efforts, hazard assessments, and infrastructure planning, as there is a high chance of 7.0-magnitude quakes in coming decades.

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