Fig. 7. Shading indicates the mass fraction of CO₂ in the gas phase, labeled contour lines indicate the water saturation, and vectors indicate the pore velocity of the gas phase for a leakage rate of 4 x 10⁵ kg yr^-1 and at steady-state seepage rates with (a) a permeability of 1 x 10^-9 m², (b) an anisotropy of 1000:1, (c) a source radius of 10 m, and (d) a source radius of 1000 m. The maximum vector size represents a value of approximately (a) 1.0, (b) 8.4, (c) 17, and (d) 0.0048 m d^-1.