Fig. 2From: Deriving amplification factors from simple site parameters using generalized regression neural networks: implications for relevant site proxiesSchematic representation of the 1D site response analysis method for a site consisting of n horizontal layers soils overlying bedrock. The parameters for each layer i are its thickness \(h_{i}\), shear modulus \(G_{i}\), shear wave velocity V i , damping ratio \(\zeta_{i}\), unit mass \(\rho_{i}\), and thickness h i = z i − z i-1 Back to article page