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Limit equilibrium analyses were conducted using pseudo-static approach to investigate the behavior of a typical reinforced slope under seismic loading. Slope height, slope face inclination, internal friction angle of the fill materials and seismic acceleration coefficients were all varied so that the length and tensile strength requirements of the geosynthetic reinforcement layers were determined for different factor of safety (FS) values. The influence of failure mechanism (i.e. external and internal) on geosynthetic required length and tensile strength for a certain value of FS was also discussed. According to the results, for a particular FS value, there was a minimum geosynthetic length and tensile strength to ensure that the internal or external failure mechanism will occur. Regardless of the failure mechanism, increasing the slope height was shown to critically increase the minimum safety demands in terms of the …