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The work presents the results of method development for matrix effects correction in X-ray fluorescence measurements of Ti, Mn, Fe and U concentrations in the silicate-type uranium ore samples using wavelength dispersive XRF spectrometer S 8 Tiger (Bruker AXS GmbH, Germany). Comparison of the results obtained using standard software package Spectra Plus of the spectrometer and normalized to intensity of characteristic line of primary radiation, incoherently scattered by sample, was carried out. It is shown that for the investigated elements during X-ray fluorescent measurements of their concentrations, in addition to intensity normalization, it is necessary to use additional analytical correction. The use of this method to calculate the corrected concentrations of TiO2, MnO, Fe2O3 and U3O8 allows to decrease the relative error of measurements up to < 5 % within the range of concentrations 0.1…4 mas. % and up to ≤ 7.5 % within the range of concentrations 0.04…0.06 mas. %.

The simulation results of the effects of the Earth upper atmosphere thermal and dynamic conditions disturbances during the strong magnetic storm of November 13–14, 2012 are presented. The magnetic storm has caused a whole package of processes which accompanied plasma, electric and magnetic fields disturbances in different regions of near-Earth space. The occurrence of individual characteristics and general regularities in geomagnetic storms is confirmed.

The results of studying the F region and topside ionosphere response to the strong magnetic storm of November 13–14, 2012 (Kp max=6+) are presented. The observations are carried out by the Kharkiv incoherent scatter radar. The magnetic storm was accompanied by the ionospheric storm with sign-variable phases. This storm was featured by the presence of two positive and one negative phases of disturbance.

Calculation of dynamic and thermal processes parameters during the severe magnetic storm of August 5–6, 2011 (Kp max=8−) are presented. The magnetic storm was accompanied by negative ionospheric disturbance over Kharkiv which caused a number of changes in ionosphere. Plasma heating was observed during electron concentration depression in the F-layer which was accompanied by changes in neutral atmosphere composition and ionospheric dynamics.