Fig. 4 | Nature Communications

Fig. 4

From: Compositional heterogeneity near the base of the mantle transition zone beneath Hawaii

Fig. 4

Waveform stacks and associated amplitude–distance curves for SS data that sample the mantle transition zone NW and SE of Hawaii. a, b show the filtered time–distance plots for the two regions, and cf the amplitude–distance plots for the two regions and two discontinuity depths. Horizontal bars in a, b mark polarity transition distances based on visual inspection. In cf, the solid and dashed red lines represent the best fits of the reflection coefficients with and without thermodynamic adjustment, respectively (the former uses thermodynamically derived Δρβ ratios)

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