The UK is sending a robot boat to survey the Tonga underwater volcano that blew its top in January. Hunga-Tonga Hunga-Ha'apai's eruption caused one of the fiercest volcanic explosions in more than ...

Shock waves triggered by a massive underwater volcanic eruption near Tonga on Jan. 15 were apparently responsible for tidal surges seen along Japan’s Pacific coastline, according to experts.

It was one of the most powerful volcanic eruptions ever recorded. And it was a wake-up call. Locator map showing Tonga islands on globe, as well as location of volcano in relation to other islands.

A massive volcanic eruption in Tonga, on Saturday, triggered a tsunami that spread across the Pacific in a matter of hours. Waves hit Australia, New Zealand and Japan as well as the west coasts of ...