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Table 2

Details of correlations between the Ap geomagnetic index and power input to the magnetosphere .

  Years (inclusive) Averaging interval, τ Number of samples, N Overall daily data availability Ap series averaging series Best-fit α Correlation coefficient, r Confidence, S (%)
(to 3 decimal places)
A 1996–2016 1 year 21 98.60% Coincident data, Apc τ=1yr 0.46 0.9931 100.000
B 1996–2016 1 year 21 98.60% Coincident data, Apc ann 0.53 0.9942 100.000
C 1996–2016 1 day 12198 98.60% Coincident data, Apc τ=1day 0.46 0.9045 100.000
D 1964–2016 1 year 53 63.01% All data, Ap ann 0.53 0.9213 99.998
E 1964–2016 1 year 48 63.01% Coincident data, Apc & years with f < 0.15 discarded τ=1yr, years with f < 0.15 discarded 0.46 0.9932 100.000
F 1964–2016 1 year 48 63.01% Coincident data, Apc & years with f < 0.15 discarded ann, years with f < 0.15 discarded 0.53 0.9962 100.000

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