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. 2015 Jul 28;6:7865. doi: 10.1038/ncomms8865

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Edges of the African LLSVP are envisioned as sites of flux expulsion. (a) Radial component of the geomagnetic field at the core–mantle for 1980 (ref. 11) shown with sharp edges of the African LLSVP27,28 (black outline). Northern boundary of the LLSVP (dashed) is uncertain in these models27,28. Arrow highlights region of reversed flux at the CMB. (b) Edges of African LLSVP at CMB from ref. 27. Note arrow for comparison with a. (c) Schematic model of the beginning stages of flux expulsion at steep edge of African LLSVP. Basal 300 km of LLSVP shown (diagonal stripes).