Fig. 1From: Deriving amplification factors from simple site parameters using generalized regression neural networks: implications for relevant site proxiesSpectral content for the 14 input waveforms considered for the computation of amplification factors. Each thin curve represents the normalized acceleration response spectrum \(S_{a,j} \left( T \right)_{\text{bedrock}} / pga_{j}\) of the jth acceleration waveform (j = 1–14), the thick solid line represents their geometrical meanBack to article page