1. A method of reservoir fracture characterization, the method comprising: obtaining seismic traces; combining seismic traces into gathers that reveal acoustic reflectivity as a function of offset, azimuth, and position; measuring reflection anisotropy as a function of position; determining a relationship between reflection anisotropy and fracture intensity measurements at specific positions; and applying the relationship to reflection anisotropy measurements to create a set of fracture intensity measurements at regularly-spaced positions.