Extended Data Fig. 3: Isotropic VS distribution at different depths.

a-i. VS perturbations at 100, 150, 300, 400, 500, 600, 700, 800, and 900 km depths. Only reliable regions (Extended Data Fig. 5) are shown colored (note variable color bars). Tectonic regions20 are outlined in a. The craton boundary in Fig. 1 is plotted as gray dashed lines on b. The boundary for dripping bodies in Fig. 2c is plotted as gray dashed lines on c-f.