Articles | Volume 9, issue 2
https://doi.org/10.5194/se-9-491-2018
https://doi.org/10.5194/se-9-491-2018
Research article
 | 
25 Apr 2018
Research article |  | 25 Apr 2018

Geomagnetic field declination: from decadal to centennial scales

Venera Dobrica, Crisan Demetrescu, and Mioara Mandea

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Short summary
By analyzing frequency constituents of declination secular variation at inter-decadal and sub-centennial timescales from geomagnetic observatories with data longer than 1 century and several historical data sets, we suggest that the geomagnetic jerk concept should be considered as a more general notion, namely the evolution of the secular variation as a result of the superposition of two (or more) constituents describing the effects of processes in the Earth’s core at two (or more) timescales.