When did the U.S. National Tsunami Warning Center become operational?

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Aceh, Indonesia: tsunami aftermath — tsunami Aftermath of the December 2004 tsunami in Aceh, Indonesia.

The U.S. National Tsunami Warning Center (NTWC) became operational in 1967.1

While the first elements of a tsunami warning system in the United States were established in 1949, the NTWC specifically began its operations later to help mitigate the hazards posed by these ocean waves.1