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Fig. 7 | Earth, Planets and Space

Fig. 7

From: Geomagnetic Virtual Observatories: monitoring geomagnetic secular variation with the Swarm satellites

Fig. 7

One-monthly Observed Field (blue dots) and Core Field (red dots) GVOs mapped to Earth’s surfaced with \(\pm \sigma\) uncertainty envolopes, together with simple monthly means (yellow stars) and revised monthly means (black stars) from three of the selected polar ground observatories, left column: Resolute Bay (Canada), middle column: Macquarie Island (Australia), right column: Mawson Station (Antarctica). Top row is the radial field component, middle row is the southward field component, bottom row is the eastward field component, units are nT

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