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What makes a tsunami — and what to do if one comes

A traffic police officer in Peru sets up a roadblock during a tsunami warning in La Punta, Callao province on July 30, 2025. Alerts were issued in countries across the Pacific, following a massive 8.8-magnitude earthquake off the east coast of Russia. (AFP via Getty Images)
A traffic police officer in Peru sets up a roadblock during a tsunami warning in La Punta, Callao province on July 30, 2025. Alerts were issued in countries across the Pacific, following a massive 8.8-magnitude earthquake off the east coast of Russia. (AFP via Getty Images)

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