Geography
How the Ocean Surface Mirrors the Seafloor
Quick fact
A seamount can make the ocean surface bulge upward by about 1 to 2 meters, while a deep ocean trench can cause a depression of a similar amount—features that are invisible to the eye but detectable by satellites.
Why this is interesting
You probably think of the ocean as a flat, rolling expanse of water. But beneath your boat, the surface is quietly bulging and dipping, mimicking mountains and trenches miles below.