An eruption of the Hunga Tonga-Hunga Ha’apai volcano in the South Pacific Ocean on January 15, 2022 created a rare event never before detected with modern instruments. A powerful tsunami raced forward, leaving an untold number of lives hanging in the balance.
Notably, only 5% of tsunamis are triggered by volcanic activity — and this one was massive. The waves were measured thousands of miles away, as far as the Caribbean.
Immediately, NOAA scientists at the tsunami warning centers sprang to action. NOAA’s global network of ocean buoys, water-level stations and other observation tools informed tsunami alerts for coastal locations throughout the Pacific Basin, parts of Alaska and the U.S. West Coast.
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