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A magnitude 7.1 quake shatters the San Francisco Bay Area, collapsing the upper
Featured Event 1989 Event

October 17

Loma Prieta Quake: San Francisco Wakes to Ruin

A magnitude 7.1 quake shatters the San Francisco Bay Area, collapsing the upper deck of the Cypress Street Viaduct and killing 42 people instantly while claiming 57 lives total. This disaster forces California to mandate seismic retrofitting for all major bridges and highways, fundamentally overhauling the region's infrastructure standards for decades to come.

October 17, 1989

37 years ago

Key Figures & Places

What Else Happened on October 17

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