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Tsunamis | SF.gov

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A tsunami is a series of ocean waves that can cause dangerous coastal flooding and other damage. Some San Francisco neighborhoods are more at risk than others.

Tsunamis | SF.gov Skip to main content Info Page Tsunamis A tsunami is a series of ocean waves that can cause dangerous coastal flooding and other damage. Some San Francisco neighborhoods are more at risk than others. These waves are usually triggered by earthquakes, landslides, or other large disturbances in the ocean. Tsunamis can last for hours, and the first wave is often not the biggest—so it’s important to stay alert. Tsunamis can also cause strong, unpredictable currents off beaches and in marinas and harbors, making it dangerous to be in those areas. Tsunami Hazard Zone Map Use our Tsu

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