Natural Hazards

(Last Updated: 09-07-2026)

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San Francisco Earthquake & Tsunami Risk Alert

Scientific assessments indicate elevated tectonic stress within California's major fault systems, including the San Andreas Fault. Current research suggests conditions are consistent with an increased likelihood of a major earthquake compared with historical periods. While the timing and location of any earthquake cannot be predicted, residents and organizations are strongly encouraged to complete preparedness measures and remain informed through official emergency communications.

Scientific References: [1], [2], [3], [4] Learn More (Simplified): [1], [2]
Estimates (Hazard Assessment):
Type: Submarine earthquake (seaquake) Magnitude (Mw): 9.0 Classification: Great (Megaquake) Duration: 5 minutes Location: North Pacific region
Affected Areas: Potential areas of impact include the mainland and surrounding islands, where extensive destruction may occur.
Additional areas at risk: includes Los Angeles, San Diego, and other locations within the surrounding region.
Secondary hazards: An unprecedented quake-induced tsunami is expected, followed by numerous aftershocks of varying intensity. These subsequent seismic events may trigger additional, smaller tsunamis and could further impact major fault lines.

Alert Date: 09-07-2026

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Page Last Updated: 2026-07-20