Satellite data reveal nearly 20,000 previously unknown deep-sea mountains
The find roughly doubles the number of known seamounts in Earth’s oceans
![An elevation image of Kelvin Seamount, in a rainbow of color with purple at the bottom and red at the top, on a black background.](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2023/04/041823_KK_seamounts_feat.jpg?fit=1030%2C580&ssl=1)
Ship-mounted sonar reveals how Kelvin Seamount, off the coast of Massachusetts, rises from the seafloor (purple and blue denote low elevation while red is high). A new mapping technique based on satellite data has found thousands of previously unknown undersea mountains.
Woods Hole Oceanographic Institution