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Earth, Planets and Space
Fig. 3 | Earth, Planets and Space

Fig. 3

From: The 2014 geomagnetic jerk as observed by southern African magnetic observatories

Fig. 3

Secular variation of the Y component as measured between 200511 and 2015 at Southern African magnetic observatories HER, HBK, KMH and TSU. The black dots show monthly mean secular variation estimates derived as running annual differences. CHAOS-6 and POMME 10 model predictions are also included. Piecewise linear fits to the data provide estimates of secular acceleration as given in the different legends

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