Island arcs, which arise from volcanic activity along subduction ... to island arcs through hydrothermal alteration of the ocean floor, which is ultimately subducted into the mantle source regions ...

The world's largest volcano has been discovered on the floor of the Pacific Ocean. The volcano, 1,600 kilometres east of Japan and called the Tamu Massif, is the size of the British Isles.

Jeju Volcanic Island and Lava Tubes together comprise three sites that ... the fortress-like Seongsan Ilchulbong tuff cone, rising out of the ocean, a dramatic landscape; and Mount Halla, the highest ...

Volcanic eruptions in the middle of tectonic plates, far from any volcanically-active plate boundaries, have created many of the thousands of ocean islands and seamounts that cover Earth's ocean ...

In 2022, a new volcanic island emerged from the ocean nearby – and it’s just grown again. Before this point, the island at Home Reef had reached 12.2 hectares (30.1 acres), which is roughly ...