But the danger appeared to be waning in some places, with the US state of Hawaii and Japan downgrading their warnings.

Tsunamis, triggered by earthquakes, volcanic eruptions, and landslides, have caused immense devastation throughout history. The 2004 Indian Ocean tsunami was the deadliest, claiming over 230,000 lives ...

The world has witnessed several catastrophic earthquakes, with the 1960 Valdivia, Chile quake topping the list at magnitude 9 ...