English: The submarine volcano Fukutoku-Okanoba erupted in early February, releasing ash and steam plumes, and discoloring nearby ocean water. On February 9, 2010, the Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) on NASA’s Terra satellite captured this false-color image. Water colored by the underwater plume appears electric blue in this image, in contrast to the surrounding navy blue water. The discolored water forms a rough V shape north of the volcanic summit. The summit of Fukutoku-Okanoba lies 14 meters (46 feet) below sea level. It is part of the Volcano Islands in the Ogasawara Islands. The volcano is approximately 5 kilometers (3 miles) northeast of the island of Minami-Iwo-jima and about 1,000 kilometers (600 miles) south of the main Japanese archipelago.