Where this source supports the record
Each entry separates the article’s editorial relevance note from its exact, section-level claims. A bibliography link without a direct claim is labeled plainly.
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Natural disasters · 18–21 April 1906Open article references →
The 1906 San Francisco Earthquake and Fires
San Francisco and the San Andreas Fault rupture zone · United States
Why editors use it herePublic-media history of the earthquake, fires, water-system failure, displacement, and rebuilding.
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Quick read
At 5:12 a.m.
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Trigger and conditions
The Pacific and North American plates slipped along the San Andreas Fault.
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Uncertainty
Contemporary official counts substantially understated deaths, particularly among marginalized and transient residents.
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Why it matters
The disaster remains a powerful example of cascading risk: a geologic event became an urban fire and housing emergency because critical systems failed together.
Reviewed 24 July 2026
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Quick read