P094 3-D WAVEFRONT CONSTRUCTION FOR P & SV WAVES IN TRANSVERSELY ISOTROPIC MEDIA Summary 1 The efficient calculation of 3-D Green’s functions in anisotropic elastic media required for asymptotic migration/inversion methods of seismic reflection data is still a challenge. Vinje et al. (1993) and Lambaré et al. (1996) presented the wavefront construction method (WFC) for isotropic media. It allows fast calculation of multi-valued traveltime and amplitude maps which are important for good imaging results in areas with a complex geological structure. We present an extension for the WFC method based on the implementation of Lucio et al. (1996) for 3-D