Fig. 9

(a) Calculated and observed gravity anomalies for line SPr2. The red line is the observed free-air gravity anomaly. The dark blue line indicates the calculated gravity anomalies derived from the preferred seismic model (Fig. 7(a)). The broken dark blue line indicates the original model (Takahashi et al., 2009) after addition of the gravity anomaly reflecting the subducting plate. The light blue line indicates the calculated gravity anomaly derived from the preferred seismic model (Fig. 7(a)) and the broken light blue line indicates the original model (Takahashi et al., 2009) without correction for the effect of the subducting plate. (b) Density structure derived from the preferred seismic model (Fig. 7(a)) incorporating the density anomalies of the subducting plate.