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Abstract: In this paper the results of the numerical analyses, related to a site of the Abruzzo Region (Celano-AQ), finalized to the evaluations of site effects, are shown. The aim of the work was to give a methodology and results that can be used in seismic risk analysis, at the level of urban planning. Therefore, a series of geologic, geomorphologic, geotechnical and geophysical analyses have been carried out to characterize the lithological units and to identify the areas affected by site effects. The expected seismic inputs are individuated and two-dimensional numerical analyses have been done. The results are presented in terms of elastic pseudo-acceleration spectra and amplification factors, computed as the ratio between spectral intensity of output and input, in the period ranges 0.1–0.5 and 0.1–2.5s. [Copyright &y& Elsevier]