Indian Ocean gravity hole: How an ancient ocean carved a gravitational dent

A vast ‘gravity hole’ in the Indian Ocean, where sea levels dip significantly due to weaker gravity, has finally been explained. Scientists discovered that ancient remnants of the Tethys Ocean, sinking deep into Earth’s mantle millions of years ago, displaced denser material. This triggered the rise of low-density magma plumes, lessening the gravitational pull and creating the observed dip.