Spatialtemporal perturbation of the geomagnetic field of certain territories in the northern and southern hemispheres of the Earth

1Orlyuk, MI, Romenets, AO
1S. I. Subbotin Institute of Geophysics of the NAS of Ukraine, Kyiv
Dopov. Nac. akad. nauk Ukr. 2018, 10:64-71
https://doi.org/10.15407/dopovidi2018.10.064
Section: Geosciences
Language: Ukrainian
Abstract: 
The article considers a spatialtemporal perturbation of the geomagnetic field for regions of high and middle latitudes of the northern and southern hemispheres of the Earth. For this purpose, the modulus of the induction of the geomagnetic fields of Ukraine, Yamal (Russia), and near the Ukrainian Antarctic station "Akademik Vernadsky" ("AV") is analyzed for the period from 1950 to 2010. Essential spatial changes in the geomagnetic field are shown. So, for the 2010 epoch for the territory near the station, the modulus of the induction vector $B_{“AV”}$ is on the average by 10,000 nT less than its value on the territory of Ukraine and 20,000 nT – of Yamal. That is why significant temporal changes of the geomagnetic field were revealed: its increase by 1,400 nT for Ukraine and Yamal and a decrease by 6,000 nT in the area of the station "AV". An ecological evaluation of the geomagnetic field is carried out.
Keywords: environmental standard, geomagnetic field, spatialtemporal perturbation
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