The solid line represents the slope and intercept of the best, least-squares fit to the two sets of rates weighted by their uncertainties. Dotted line has a slope of 1.0 and intercept of 0.0, corresponding to perfect agreement between the two sets of rates. Bold dark lines show positions of major spreading centers, overlapping about the microplate. Stippled regions show areas of convergence. Brunhes anomaly is stippled.
Diagonal hatching represents compressional ridges or other complex structures.
Figure and caption are modified from Searle et al. Note how the earthquake slip vectors parallel the trench-normal direction rather than the predicted convergence direction.