2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/22151We use the replica variational method to study the effects of weak point disorder on the variance of the internal field distribution measured in NMR and muon-spin rotation experiments in type-II superconductors. We show that for a simple model there is significant magnetic field dependence which is extrinsic and disorder-driven, and does not have a microscopic (non $s-$wave pairing) origin. Results are presented where we examine the dependence of the magnetic field variance upon the strength of the applied external field.2B/W eps figure included. Contact: gingras@gandalf.uwaterloo.caDisordered Systems and Neural NetworksSuperconductivitytext