Earth's core catches a wave.

The article presents a study on the presence of fluid core of the innermost core of the Earth's layer by Jean Dickey at the National Aeronautics and Space Administration's (NASA) Jet Propulsion Laboratory and Oliver de Viron at the Institute of Earth Physics in Paris. The study implies the surface magnetic measurements to determine the magnetic flux of the liquid core. Moreover, researchers have found four robust modes of angular-momentum oscillations that correspond with magnetic waves.