A research team discovers thousands of previously unknown underwater volcanoes on the seabed. These can open up a "window to the Earth's mantle" for researchers.
Three-quarters of Earth's volcanic activity takes place underwater, according to the U.S. National Oceanic and Atmospheric Administration (NOAA) The newly discovered mountains in the sea have a height of between 421 meters and 2,500 meters. The study was published in the journal Earth and Space Science.. North of Japan lies the underwater volcano Kaitoku. It is located about 100 meters below the surface of the water.