Geological Institute of Romania Caransebes str.1 012271 Bucharest Romania;
Geological Institute of Romania Caransebes str.1 012271 Bucharest Romania;
Faculty of Transportation University POLITEHNICA of Bucharest Splaiul Independenei str.313 060042 Bucharest Romania;
Fourier spectral deconvolution; wavelet analyses; geomagnetic disturbances; geomagnetic observatories;