FIGURE 2.

Left: fixed velocity field $c$ in $\mathrm{\Omega }$. Right: contour plot of the associated anisotropic eikonal equation with anisotropic conduction $\mathbf{D}\left(\mathbf{x}\right)=c{\left(\mathbf{x}\right)}^2\mathbf{I}$ along with the geodesic path joining the EAS ${\mathbf{x}}_1$ with an arbitrary point