In order to illustrate the earth's magnetic field, three datasets for Earth's Magnetism have been created. All of these datasets show the changes in the magnetic field from 1590 - 2010. The first dataset shows the magnetic field lines at the surface of the Earth. The magnetic poles are indicated by stars. The blue lines show where the magnetic field dips into the Earth and the red lines show where the magnetic field emerges from the Earth. Where the field lines are horizontal to the Earth, between the red and blue lines, is the magnetic equator shaded yellow.
Via Sakis Koukouvis