After suspecting the presence of a series of underwater volcanoes near the Cook Islands, researchers have now mapped out the ...

Axial Seamount, one of the most active underwater volcanoes in the world ... to produce high-resolution images of the subsurface. The findings show a main magma reservoir beneath the summit ...

These newly mapped underwater volcanoes were first theorized in 2024 after researchers discovered that the rocks of one submerged volcano were only 670,000 years old.

Researchers uncover a possible active underwater volcano chain near the Cook Islands, hinting at fresh geological activity.

Charlotte Lytton and Matthew Abbott traveled to Tonga to report this story. All photographs were made in May 2023. Sept. 1 at 6:00 a.m. Warning: This graphic requires ...

When this process occurs repeatedly, it can result in the formation of underwater volcanoes. If it happens frequently enough, the volcanic structure can accumulate and eventually rise above the ...