Captured by high-resolution cameras aboard a robotic submersible, mineral-rich water spews from hydrothermal vents in this June 30 picture of Kawio Barat, a massive undersea volcano off Indonesia.

During the past few weeks, the submerged volcano—one of the world’s largest—was mapped and explored in detail for the first time by a joint Indonesian-U.S. expedition north of the island of Sulawesi.

Tags: Camera, Discovery, Ocean, Robot, Volcano, Water
Posted in Geology, Marine Science, Natural Disasters