(color online) Plots of shock wave of lower order modified 3D Burgers’ equation versus χ for different ion densities and temperature ratio for Maxwellian ions α = 0 and trapped electron temperature ratio ν = 0 (flat trapped). Here blue (upper solid) curve for ρ₁ = 0.25, ρ = 1, δ₁ = δ₂ = 2, dash line for ρ₁ = 0.1, ρ = 0.25, δ₁ = δ₂ = 2, and orange curve for ρ₁ = 0.1, ρ = 0.25, δ₁ = 3, δ₂ = 10.