... 104, 1 09, 112Wavelength of flexure 6Weakening slope stability 90 , 91 , 97 , 99 , 102Wedge method 92 Well-graded 65ZZonal liquefaction 96 , 98 , 102Zone factor 1 19 136 Basic Geotechnical Earthquake ... 21, 22, 24, 26, 28, 29 Slip surface 90 , 92 , 93 , 94 , 95 , 97 , 100, 101Slope movement 90 , 96 Soil amplification 120Soil dynamics 38Southern Gondwanaland 31Spread footing 78, 79, 80, 82, 83, 85, ... 39, 41, 48Sheet pile 106, 107, 112, 113Shillong Plateau 33Significant earthquakes 4Simplified procedure 67Single-degree-of-freedom 118Slides 90 , 97 , 98 , 99 , 102Skudes 97 Slip 12, 17, 19, ...