Fig. 6From: A harmonic spline magnetic main field model for Southern Africa combining ground and satellite data to describe the evolution of the South Atlantic Anomaly in this region between 2005 and 2010Secular variation at TSU, KMH, MAU, SWP and HER for Y component. Secular variation of the Y component at the four observatories (data in black) and two additional reference points between 2005 and 2010 as given by SACFM-2 (green) and CHAOS-6 (blue) modelsBack to article page