A diagram shows the mechanisms feeding ... "Flow in the outer core drives the geodynamo that sustains the magnetic field. This flow is aligned with the Earth's rotation axis and influenced by ...

Abstract: Although it is known that the geodynamo has been operating for at least 3.2 Ga, it remains difficult to infer the intensity, dipolarity and stability (occurrence of reversals) of the ...

Currents induced in this sheet by the temporally varying magnetic field produced by the geodynamo give rise to a discontinuity in the horizontal components of the poloidal magnetic field on crossing ...