A rigid, non-vertical, cantilever retaining wall of height H is placed with a dry, cohesionless, inclined backfill of unit weight γ as shown in Figure 1. The wall face AB on the backfill side is inclined at an angle θ with the vertical and has a wall friction angle δ. The objective is to determine the passive resistance and distribution of passive earth pressure per unit length of the wall in the presence of horizontal and vertical earthquake acceleration khg and kvg respectively where, g is the acceleration due to gravity. Considering the planar failure surface BC at an angle α with horizontal, all the forces acting on the retaining wall during passive state of equilibrium is shown in Figure 1.