Rare sonar mapping—conducted before and after an undersea volcano erupted off the coast of Tonga in 2022—has uncovered the unique reasons for its deadly tsunami.

When an undersea volcano erupted in Tonga in January, its watery blast was huge and unusual — and scientists are still trying to understand its impacts. The volcano, known as Hunga Tonga-Hunga Ha’apai ...

Hidden in the Pacific, two very different volcanoes are forcing scientists to rethink what counts as “biggest.” Tamu Massif, a shield-like giant buried beneath the northwest Pacific, spent years ...

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Volcanoes erupt because hot, melted rock from deep inside the Earth finds a way to reach the surface. This melted rock is ...

NEW YORK (AP) — When an undersea volcano erupted in Tonga in January, its watery blast was huge and unusual — and scientists are still trying to understand its impacts. The volcano, known as Hunga ...