Fig. 7From: The BGS candidate models for IGRF-13 with a retrospective analysis of IGRF-12 secular variation forecastsDifference in each magnetic component between the BGS SV candidate model and IGRF-13 SV for 2015–2025 (spatially Huber-weighted mean of IGRF-13 candidates). Values of contours (grey lines) are marked on the colour scales, with a thicker line for the zero contourBack to article page