Epidemic spreading threshold λc with respect to contact radius rc in the case pjump = 0 (a) and pjump = 0.1 (b). The parameters of the model are N = 200, L = 20, v = 0.05, vjump = 1, ρ = 0.5, μ = 0, and σ = 0. The results are averaged over 10 runs.