English: Maps of four different depth slices of the Shear-velocity (Vs) model developed by Emry et al. 2018 (https://doi.org/10.17611/DP/EMCAFANTEM18, modified from the original using the IRIS DMC application https://doi.org/10.1785/0220120032). The forms of the zones with lower Vs (colors toward red) suggest the hotter structures in the Mantle. The distinguishing fourth map depicts a depth below the 410 km discontinuity where Vs steeps up (getting overall bluer) but still displays the signature of a plume at the substrate of the East African Rift. In the white box, the Vs vertical profile at 10°N, 40°E to illustrate the increase of velocity with depth and the effect of the 410 km discontinuity.