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An eruption occurs at the underwater volcano Hunga Tonga-Hunga Ha'apai off Tonga on Jan.15.    © Tonga Geological Services/Reuters
Natural disasters

Satellite images show explosive power of Tonga underwater volcano

Experts say 'once-in-a-century' eruption has unique seismic features

Nikkei staff writers | Pacific Islands

On the morning of Jan. 15 (GMT), there was a massive eruption of an underwater volcano in the waters off Tonga, producing a plume over 16,000 meters high. Shock waves from the eruption, which experts described as a "once-in-a-century" event, rippled through Earth's atmosphere and the Pacific Ocean.

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