Investigation of Strong Geomagnetic Storms Using Multidisciplinary Big Data Sets

The paper contains an overview of world data centres as INETMAGNET, SWS, DIAS, IGS, and EUREF, which are repositories of scientific Big Data sets for studying geomagnetic storms, by the means of the available geomagnetic, ionospheric and GNSS data. As an example, the results of a study based on Wavelet Analysis of the local manifestation of the geomagnetic storm on September 7-8, 2017, using time series of observed geophysical parameters obtained from different stations in the Balkans and from satellite observations, are presented. These data include global geomagnetic indexes and local data, in which the H-component of the geomagnetic field, critical frequency f_oF2 of the ionospheric F2 layer, and VTEC from GPS observations at a separate measuring station are included too. Specific features of the local manifestation of this storm event are outlined, based on the performed joint analysis and comparison of the geophysical parameters.