23°14′40″S 8°16′20″E / 23.24444°S 8.27222°E The Ewing Seamount is a seamount in the southern Atlantic Ocean, which lies on the Tropic of Capricorn.[1][2][3] Ewing is part of the Walvis Ridge[1] having a mean depth of 4,500 metres and a summit depth of 700 metres.[4]