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Los Angeles Scoop · Jul 27, 2026

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New Study Warns San Andreas Fault Under Highest Stress In 1,000 Years — Big One Could Cost Up To $1 Trillion A new scientific study is raising fresh concerns about Southern California's earthquake risk, finding that the San Andreas and San Jacinto fault systems are under the highest levels of tectonic stress seen in the past 1,000 years. Researchers say the faults are now in a "critically loaded" state, although they emphasize the study does not predict when a major earthquake will occur. At the same time, earthquake experts are warning that a magnitude 7.8 earthquake on the southern San Andreas Fault could become the costliest natural disaster in U.S. history. Updated estimates put the potential economic damage between $500 billion and $1 trillion, far higher than previous projections because of California's growing population, infrastructure, and wildfire-related risks. While no one can predict the timing of the "Big One," experts continue to urge Californians to be prepared with emergency supplies, a family communication plan, and secure heavy furniture before the next major quake strikes.

*New Study Warns San Andreas Fault Under Highest Stress In 1,000 Years — Big One Could Cost Up To $1 Trillion* A new scientific study is raising fresh concerns about Southern California's earthquake risk, finding that the San Andreas and San Jacinto fault systems are under the highest levels of tectonic stress seen in the past 1,000 years. Researchers say the faults are now in a "critically loaded" state, although they emphasize the study does not predict when a major earthquake will occur. At the same time, earthquake experts are warning that a magnitude 7.8 earthquake on the southern San Andreas Fault could become the costliest natural disaster in U.S. history. Updated estimates put the potential economic damage between $500 billion and $1 trillion, far higher than previous projections because of California's growing population, infrastructure, and wildfire-related risks. While no one can predict the timing of the "Big One," experts continue to urge Californians to be prepared with emergency supplies, a family communication plan, and secure heavy furniture before the next major quake strikes.

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