Fig. 2 | Nature Communications

Fig. 2

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

Fig. 2

SS precursors before and after array analysis. a Time–distance plot of ~180,000 waveforms between 70° and 170° stacked at 0.5° intervals and aligned on the surface reflection SS (set to 0 s). At large distances the stacks are noisy due to decreased data volume. b Travel times relative to SS predicted from ak13526. c Multiples of S, S diffractions, and precursors to ScSScS. d SS and precursors. Curvelet filtering effectively decomposes the recorded wavefield (a) into multiples (c) and the SS wavefield (d). Horizontal bar in d, near 200 s before SS, marks the distance across which the 660 reflection changes polarity (that is, 2σ uncertainty of estimates of zero-reflection distance)

Back to article page