The shear wave velocity ( \({V}_{s}\) ) profile of the subsurface soils and rocks is an essential parameter for site response analysis, stiffness estimation and seismic site classification. In field, \({V}_{s}\) is measured using two types of survey method—borehole and surface methods—which often result in conflicting \({V}_{s}\) profiles, leading to different stiffness representations of the same site. Moreover, seismic site classification often uses these \({V}_{s}\) data and SPT N-values. The correlations of N-values and \({V}_{s}\) are often used instead of measuring \({V}_{s}\) in situ. The variability among different methods is still not clearly understood and needs to be explored. Minimal studies are available to show how these \({V}_{s}\) profiles are comparable, and how seismic site classification varies with selection of survey method. In this study, both borehole-based and surface-based methods are used to determine \({V}_{s}\) profiles at five kinds of geological settings spread over twenty-eight test locations in different geological formations. Variability between \({V}_{s}\) profiles at the same location is studied, and site classification from different methods is compared, along with the scatter in individual \({V}_{s}\) values from different methods. The local geology and subsurface layers influenced the variation of \({V}_{s}\) . Two methods of site classification were used, based on average \({V}_{s}\) & SPT N up to 30 m and average \({V}_{s}\) and SPT N-values up to bedrock depth, as mentioned in the literature. At most locations, any change in site classification was not observed with a change in the survey method. However, the \({V}_{s}\) and average \({V}_{s}\) values vary significantly across different methods at a few geological formations.
