Fig. 8.
From: Evaluation of candidate geomagnetic field models for IGRF-11
Difference between the Z component of the magnetic field of IGRF-2010 candidate models and the weighted mean model Mw plotted at Earth’s reference radius in Winkel tripel projection. Contours are at intervals of 5 nT with labels every 10 nT when sufficiently large. Red: positive, Blue: negative. The dip equator is shown.