Ray in a sphere with a constant v Kasper van Wijk 10.17608/k6.auckland.7940828.v2 https://auckland.figshare.com/articles/figure/Ray_in_a_sphere_with_a_constant_v/7940828 Ray in a sphere with a constant v 2019-04-02 21:23:53 ray tracing constant v epicentral distance Geophysics