Illustration of SZ flux decrement at a merger shock, for a spherical shock model at 1.5 Mpc distance from the cluster center, in a M₅₀₀ = 8 × 10¹⁴M_⊙ cluster at z = 0.2, with shock Mach number ℳ = 3. The gray vertical bands indicate the approximate pressure-boosted region in radial distance. Top panel: the radial distribution of pressure, demonstrating the localized boost in pressure by roughly factor ~10. The underlying dotted line is the ambient GNFW pressure model proportional to the mass of the cluster. Middle panel: the projected Compton-y parameter, solid line showing the total value. Bottom panel: the resulting SZ flux densities, in units of mJy/arcmin², as would be observed at different frequencies.