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. 2023 Apr 5;9(14):eadd4838. doi: 10.1126/sciadv.add4838

Fig. 1. Prior ULVZ studies and lowermost mantle structures.

Fig. 1.

(A) Maps showing the locations along the CMB of prior ULVZ and seismic wave scattering investigations (1, 6) in both global view (left) and in the Southern Hemisphere (right). Areas denoted in gold indicate regions where ULVZ evidence was found; those outlined in blue indicate regions where no ULVZ was observed, and those outlined in red mark uncertain regions. Pink shading indicates the LLVPs (61), and green dots mark seismic scatters (6). (B) Cartoon highlighting both upwelling (LLVP) and downwelling (subduction) in the lower mantle along with various CMB anomalies. UHVZ, ultrahigh velocity zones.