Figure 2

P-wave velocity anomalies at depths of approximately (a) 130 km, (b) 170 km, (c) 200 km, (d) 260 km, (e) 450 km, (f) 500 km, and (f) 600 km in the region indicated by thick lines in Fig. 1. The OJP is represented by the green line on each panel. Present subduction boundaries are shown in (a). H–H3 and L1 indicate regions of high velocity anomalies and low velocity anomalies discussed in the text, respectively. The GMT 5.4.553 was used to make this figure.