The following series of histograms are presented for various parameters in recently compiled SPT, CPT, and Vs liquefaction triggering databases for level ground conditions (Cetin et al., 2004; Moss et al., 2006; Kayen et al., 2013; Boulanger and Idriss, 2014). The ranges of the various parameters tabulated are also listed in Table 3.2. However, the histograms give a better indication of conditions/scenarios where case histories are well represented and not so well represented. This is important in assessing the validity of empirical and semiempirical liquefaction evaluation procedures for a given scenario.