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Fig. 9


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Locations of the geomagnetic eccentric dipole axial poles mapped into the XY plane of the GSEQ frame, viewed looking northward from the south of the solar equator (so that the ZGSEQ axis that makes up the right hand set points into the page): (a) for the northern hemisphere pole, (b) for the southern hemisphere pole. The loci are shown for: (green) the March equinox (day of year, doy, 79, F = 0.21); (mauve) the June solstice (doy 172, F = 0.47); (orange) the September equinox (doy 266, F = 0.73); and (blue) the December solstice (doy 356, F = 0.98). The dots show the location at 12 UT in each case. Note that the ZGSEQ direction is into the plane of the diagram and so the XY plane is here viewed from the southern side and so dawn is the to the left and dusk to the right and noon to the top, (in the +X direction) and hence the motion of the poles with UT is clockwise for this viewpoint.

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