On the orientation of the fast and slow directions of anisotropy in the deep inner core

@article{Frost2019OnTO,
  title={On the orientation of the fast and slow directions of anisotropy in the deep inner core},
  author={Daniel A. Frost and Barbara A. Romanowicz},
  journal={Physics of the Earth and Planetary Interiors},
  year={2019}
}

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TLDR
The existence of an innermost inner core, with a radius of ∼300 km, that exhibits a distinct transverse isotropy relative to the bulk inner core is proposed, which may represent fossil evidence of a unique early history of inner-core evolution.

Growth model of the inner core coupled with the outer core dynamics and the resulting elastic anisotropy

We present a growth tectonic model of Earth's inner core and the resulting model of the seismic anisotropy. The inner core grows anisotropically if the convection in the outer core is of Taylor
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