The results of measurements of seismic vibrations in the Exploratory Shaft (at the tunnel depth) and in the ASST building (on the surface) of the Superconducting Super Collider (SSC) site are presented. Spectral and correlation analysis of the data obtained in the frequency band 0.05–1500 Hz is performed. It is found that amplitudes of ambient ground motion are lower than collider requirements, but cultural vibrations are unacceptably large and will cause fast growth of transverse emittance of the SSC beams. The issues of uncorrelated slow ground motion governed by the ‘‘ATL law’’ are also discussed on the example of the SSC collider. © 1995American Institute of Physics