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Based on the planetary geomagnetic indices we make some considerations about geomagnetic disturbances at the beginning of the 25th Solar Cycle.One important event in this new solar cycle was the geomagnetic storm of May 12, 2021.For this event we analyzed the geomagnetic data sampled at one minute, on the North component of each selected geomagnetic observatory from INTERMAGNET, namely: Surlari (Romania), Uppsala (Sweden), Honolulu (Hawaii), Kakioka (Japan) and Ottawa (Canada).The physical parameters related to the mentioned geomagnetic storm, were obtained from the available open-source data (provided by sources mentioned in Link 1-3).Also, we performed Fourier and wavelet analyzes, based on time series of geomagnetic data from selected geomagnetic observatories for North, East and vertical geomagnetic component.