O-21 A VISCOELASTIC MODEL OF SEISMIC WAVE ATTENUATION IN ANISOTROPIC ROCKS A. HANYGA Institute of Solid Earth Physics University of Bergen All’egaten 41 N5007 Bergen Summary An anisotropic viscoelastic model of seismic attenuation is presented. The model has some important properties of physical models but is amenable to rigorous mathematical analysis and has a more economic parameterization. It is also adapted to FD numerical and ray-asymptotic solution. Introduction A physically realistic model of seismic wave attenuation must account for global and local porous flow double porosity partial saturation scattering and fast-to-slow wave conversion. This brings in a number of parameters


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