Valuation of induction current contribution to the secular variation of geomagnetic field (according to the data of Ukrainian geomagnetic observatories)
Induction current contribution to the secular variation of geomagnetic field in accordance with the data of Ukrainian geomagnetic observatories has been investigated. The dynamics of the monthly changes of the secular variations depending on the values of the induction currents has been shown. Correlation between changes of secular variations and solar activity has been found. Changes of solar activity outstrip secular variation changes.