Fig. 1.From: IGRF candidate models at times of rapid changes in core field accelerationAcceleration of coefficient with time (in nT/yr2) derived from CHAOS-2s (red) and CHAOS-2r (green) as well as from a modeling technique based on a sliding time window of width ±1.5 yr (see text). The error bars in blue are formal error estimated from the covariance matrix.Back to article page