Fig. 13From: Geomagnetic core field models and secular variation forecasts for the 13th International Geomagnetic Reference Field (IGRF-13)The first 12 eigenvectors of the toroidal flow temporal variability. The x-axes of each subplot represent the model interval (1957–2020). The percentages of the partial variance of each eigenvector are given in the top bar of the individual plotsBack to article page