Fig. 1From: International Geomagnetic Reference Field: the thirteenth generationMaps of declination (top), inclination (middle) and total field (bottom) at the WGS84 ellipsoid surface for epoch 2020. The zero contour is shown in green, positive contours in red, and negative contours in blue. White asterisks indicate locations of the magnetic dip poles. Projection is Miller cylindricalBack to article page