The following figures describe the average difference in depth between the computed 3D slab surfaces, and the earthquakes used to construct each surface. These figures thus provide a qualitative assessment of how well we are fitting the earthquakes that define the subduction geometry in each location; if we assume that the ideal geometry should approximately envelope a slabs' seismicity, then differences should average slightly less than zero (cream-white-light blue colors). Areas where large misfits exist highlight a poorly-fit surface, and may be indicative of structural complexity in the slab geometry.