The intergalactic medium contains pervasive magnetic fields ~10⁻¹⁶ to 10⁻⁹ G across vast cosmic voids and filaments far from astrophysical sources (Widrow 2002; Durrer & Neronov 2013). ΛCDM + standard BBN provides no mechanism to generate primordial seed magnetic fields, since post-recombination plasma should be electrically neutral with no large-scale currents. Proposed exotic mechanisms (phase transitions, battery effects) cannot convincingly explain field strengths + coherence + uniformity without new physics or fine-tuning.
The standard model assumes IGM magnetic fields require either primordial seed-generation mechanisms (phase transitions, inflation-driven) or astrophysical-source seeding (galactic winds, AGN jets). Recovering the observed pervasive field strengths + coherence + uniformity demands beyond-SM mechanisms or fine-tuned amplification, neither of which is parsimonious.
SCT replaces the hot-dense-center with a superluminal collision and the thermalized debris field. From this single change, IGM magnetogenesis comes from in-cycle cascade-seeded compact-object dynamics. Cascade-seeded SMBH (P46) inherited from prior cycles (P25, P28) drove AGN dynamo + jet-outflow magnetic-field generation throughout cosmic history, populating the cosmic-web filament infrastructure with magnetic fields above and beyond what hierarchical-galaxy AGN populations can produce.
Collision-shock amplification (P22, P23) at cascade-stage events provides additional magnetic-field amplification: the cascade thermalization at T_QCD ≈ 10¹² K plus turbulent shock dynamics generate seed B-fields that subsequent cascade-seeded AGN amplify into the observed pervasive cosmic-web field structure. Pre-existing matter (P25) supplies the gas + magnetic-precursor populations; the cascade did not create matter from nothing, so prior-cycle inheritance contributes to the magnetic-field history.
Multi-stage cascade dynamics (P34, P36) distributes the cascade-seeded magnetic fields across the cosmic-web filament network, naturally producing the observed coherence + uniformity across vast cosmic distances. Angular-momentum inheritance (P31, P32) gives the magnetic-field topology its J-aligned spatial structure (cross-link recid 203 synchrotron depolarization). The same M11 framework that resolves the FRB diversity (recid 153), the diffuse gamma-ray background (recid 157), the Galactic plane emission residuals (recid 202), and the broader cascade-seeded compact-object phenomenology accounts for IGM magnetogenesis.
If precision SKA + ngVLA + LOFAR-2.0 + Faraday-rotation surveys find IGM magnetic fields fully attributable to known galactic-wind + standard-AGN-jet sources at the 5% level (no cascade-seeded SMBH historical-amplification signature), the M11 cascade-seeded magnetogenesis is refuted. The signature SCT prediction is the IGM magnetic-field strength + coherence matching cascade-seeded SMBH dynamo populations.