Abstract
Macroscopic processes which may be responsible for the anisotropic structure in the Earth's inner core are examined. It is concluded that the magnetic interaction with the outer core plays the most important role in the dynamics of the inner core. Deformation due to the magnetic interaction causes cumulative strain at least for a period of one magnetic polarity (-0.1-10my), and can result in a large strain (-1-103) leading to the formation of anisotropic structures. The flow caused by the magnetic field results in continuing melting and solidification at the inner-outer core boundary which gives rise to a large energy release (or absorption). The present model shows that the pattern of energy release (or absorption) due to this mechanism is consistent with that of dynamo models, indicating that the energy release (or absorption) caused by this mechanism enhances convection in the outer core and hence stabilizes the magnetic field which is otherwise highly unstable.
