Supplementary Figure 4: Comparison of density models with and without boundary topography

Supplementary Figure 4A

Correlation between the density models of SPR6, which does not include topographic perturbations, and SPRD'6, which includes boundary topography. The prime on SPRD'6 indicates that the models of density and boundary topography are obtained without constraints from the free-air gravity anomaly. The high correlation between the models indicates their similarity.

Supplementary Figure 4B

RMS amplitude of the density parts of SPR6 (black) and SPRD'6 (green).