San Andreas Fault Stress Hits 1,000-Year High, Raising Southern California Seismic Risk

A large through-going rupture involving both fault systems could cause widespread casualties and displacement across densely populated Southern California regions including Los Angeles, San Bernardino, and Riverside.

Beneath the sprawling cities of Southern California, two great fault systems have been quietly accumulating stress for more than a century and a half, reaching a threshold not seen in a thousand years. Researchers at the University of Hawaii have given scientific form to what geologists have long suspected: the San Andreas and San Jacinto faults are critically loaded, and a geographical corridor called Cajon Pass may hold the key to whether their next rupture unfolds as one catastrophic, through-going event. The study does not tell us when the earth will move, but it reframes the silence of re

San Andreas Fault Stress Hits 1,000-Year High, Raising Southern California Seismic Risk

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