Fig. 6From: A candidate secular variation model for IGRF-12 based on Swarm data and inverse geodynamo modellingSpectra of the difference between each candidate secular variation model and the median model, based on the eight candidates submitted to IGRF-12 (Thébault et al. 2015a, b, this issue). Magenta: the candidate presented in this study. Gray: the seven othersBack to article page