Fig. 4
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Latitude (top) and longitude (bottom) of the northern geomagnetic pole location represent tilt and tilt direction of the magnetic dipole axis. Estimates are from spherical harmonic models CALS10k.1b (red with bootstrap uncertainty estimates as dashed lines), CALS3k.4 (blue), CALS7K.2 (grey) and the VGP reconstruction DEFNBKE (black with uncertainty estimates as dashed lines).
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