B253E32C-8913-4ECB-A780-9412CC164B13Fundamental plasma physics of the sun and heliosphere: CFSA WarwickResearch GrantST/P000320/10FA7FA45-02C9-433E-A750-12A20140208FSTFCINCOME_ACTUAL105550149C004E7-BA2D-4325-8E9A-72F546D7717EUsing the Index Over the Last 14 Solar Cycles to Characterize Extreme Geomagnetic ActivityGeophysical Research Letters04bae5f9d1941cf0286f508a78653ee2Chapman S2020-01-01http://dx.doi.org/10.1029/2019gl086524http://dx.doi.org/10.1029/2019gl0865243Journal Article/Review5e454eaf369298.23401826