Spectral analysis of auroral geomagnetic activity during various solar cycles between 1960 and 2014
Data sets
Geomagnetic Auroral Electrojet Index http://wdc.kugi.kyoto-u.ac.jp/aedir/index.html
Geomagnetic Auroral Electrojet Index http://wdc.kugi.kyoto-u.ac.jp/aedir/index.html