Large-scale peculiar velocities show coherent bulk flows extending 250 to 400 Mly toward Centaurus-Vela at 400 to 600 km/s, much faster and on much larger scales than ΛCDM simulations predict (Feldman 2010; Kashlinsky 2012). The amplitude is roughly 2x the ΛCDM expectation, and the flow extends to scales where the cosmological principle should enforce isotropy. CosmicFlows-4 confirms the persistent excess.
The standard model assumes a globally isotropic FLRW universe in which large-scale bulk flows damp out beyond a few hundred Mpc. There are no large-scale structures outside our Hubble sphere to source coherent motion at the observed amplitudes and scales. Persistent ~600 km/s coherent flow at Gpc scales has nowhere to come from in the model.
SCT replaces the hot-dense-center with a superluminal collision and the thermalized debris field. From this single change, our patch is one component of a multi-pocket gravitationally coupled system created by the same parent-scale collision (P58, P59), and our pocket retains a residual bulk velocity within its parent frame from the original collision geometry: v_frame ≈ v_rel(final) × (b/R_min) (P63). This frame velocity is a permanent kinematic property propagating coherently across the entire observable volume.
Sibling-pocket gravitational influence at separations of roughly 1 to 2 Gpc with recession velocities 0.23c to 0.47c (P60) adds the gravitational-attraction component to the coherent flow. Angular-momentum inheritance from the cascade event (P31, P32) deposited coherent bulk J on the entire structure, propagating J as the filament-network alignment that imprints the bulk-flow direction. The Centaurus-Vela direction aligns within roughly 30 degrees of the cosmic-web J axis, exactly the SCT prediction (P9 in Paper 13).
Gravitational superposition through the Φ_mesh contribution (P50, P52) adds an additional component that ΛCDM omits. The combined SCT prediction matches the observed CosmicFlows-4 amplitude and direction at the calibrated level. The same M9 framework that explains dark flow (recid 12), the CMB dipole excess (recid 31), the galaxy distribution dipole (recid 77), and the redshift-drift anisotropy (recid 58) explains the bulk-flow excess. There is no need to invoke breakdown of the cosmological principle or unidentified mass concentrations beyond the observable horizon.
If next-generation peculiar-velocity surveys (DESI + 4MOST + Euclid) finds bulk flows consistent with ΛCDM linear-perturbation theory at the 1% level (no excess amplitude, no Gpc-scale coherence beyond ~200 Mpc), the M9 sibling-pocket plus residual-frame-velocity explanation is refuted. The signature SCT prediction is bulk-flow direction aligned within 30 degrees of the cosmic-web J axis.