Figure 3.-- A, Normalized vertical loading for an idealized landslide with a toe initially at x/a = 1.0. B, Normalized vertical loading after the toe of the landslide has advanced to x/a = 1.1. C, Normalized deflection, V_1, caused by the initial loading and normalized deflection, V₂ caused by the additional loading after advance of the toe. D, Deflection differences caused by the advance of an idealized landslide toe from x/a = 1.0 to x/a = 1.1.