Dynamics of secular variations of geomagnetic field over the Earth’s polar caps

2013;
: pp. 335 - 337
https://doi.org/10.23939/jgd2013.02.335
Received: July 22, 2013
1
Subbotin Institute of geophysics of National Academy of Sciences of Ukraine
2
Subbotin Institute of geophysics of National Academy of Sciences of Ukraine

Secular variations (SV) of the geomagnetic field at the south and north polar caps are investigated for all observations times. It is shown that secular variations are generated by internal and external origins. It is supposed that internal origins are currents on the mantle – core border and also in tectonosphere and external origins – currents in the magnetosphere and ionosphere. Values SV from external origins depend on solar and geomagnetic activities and from internal origins are decreased.

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