TY - JOUR A1 - Kotzé, P. B. T1 - Spectral analysis of auroral geomagnetic activity during various solar cycles between 1960 and 2014 JO - Ann. Geophys. J1 - ANGEO VL - 34 IS - 12 SP - 1159 EP - 1164 Y1 - 2016/12/06 PB - Copernicus Publications SN - 1432-0576 UR - https://angeo.copernicus.org/articles/34/1159/2016/ L1 - https://angeo.copernicus.org/articles/34/1159/2016/angeo-34-1159-2016.pdf DO - 10.5194/angeo-34-1159-2016 ER -