Fig. 2From: Predictions of the geomagnetic secular variation based on the ensemble sequential assimilation of geomagnetic field models by dynamo simulationsRMS uncertainty \(\sigma ^o\), evaluated at the core surface, of COV-OBS.x1 and Kalmag truncated to spherical harmonic degree \(\ell =14\). Also shown are the COV-OBS.x1 uncertainties when corrected with lower bounds determined by Kalmag uncertaintiesBack to article page