Table 1Predicted maximum differential attenuation and travel time for custom MOR models using the method of Faul and Jackson (30).

Columns are as follows: (1) model conditions; (2) viscosity reduction between 0- and 10-My mantle, averaged between depths of 50 and 100 km; (3) maximum differential between the ridge axis and the farthest flank; (4) same as (3), but for P waves; (5) maximum differential S wave travel time between the ridge axis and the farthest flank; (6) same as (5), but for P waves.