Fig. 2. Synthetic SKS phases for two earth models. (Right) Two 50 km thick hexagonally-anisotriopic layers overlying an isotropic halfspace. The symmetry axis is horizontal in both layers, an has an azimuth of N30E in the top layer and N60E in the bottom layer. (Left) One 100 km thick anisotriopic layer overlying an isotropic halfspace. The anisotropic tensor is the arithmetic mean of the tensors in the two-layer case. Radial (top row) and transverse (second row) horizontal component synthetic seismograms (bold) are computed by convolving the impulse response functions (solid) with a pulse that has a bandwidth similar to typical SKS phases. This SKS pulse (N270E, 20 km/s) (third row) is reconstructed using phenomenlogical splitting parameters computed by the cross-correlation method. Note that the two layer case has the larger error (bottom row). (Postscript version)