In September 1952, a submarine volcano erupted 225 nautical miles south of Tokyo, Japan.
The magma that spewed from the inside accumulated in the seawater, elevating the surrounding terrain and forming a conical shape, eventually becoming an island.
This kind of event is not uncommon; the youngest island in the world, Surtsey Island, was formed in this way.
The explosion sent sea water hundreds of meters into the air, and a large amount of volcanic ash was ejected thousands of meters high, with the moving magma forming an island about 40 meters wide and 550 meters long.
Scientists, eager to study the island's formation process, prohibited tourists from entering, only allowing researchers wearing disinfection suits to conduct inspections there.
However, Japan's case was slightly different; the island also formed from the accumulation of magma, but it disappeared completely within a few days.