Table 2.

Summary of the central line equations, correlation coefficients, sample sizes, and Fisher z-transform statistics for the regression relations in this study.

Figure	Central line	ρ	No of samples	z	SE(z)	z/SE(z)
5	Rp42 = 0.99 Rp32 + 0.65	0.98	160	2.298	0.0798	29.0
15	${\mathrm{R}}_{42}^{⁎}$ = 1.24 (${\mathrm{R}}_{32}^{⁎}$)1.07	0.48	163	0.523	0.0791	6.7
16	${\mathrm{G}}_{15}^{⁎}$ = 1.38 (${\mathrm{G}}_{13}^{⁎}$)1.03	0.78	457	1.045	0.0469	22.3
17	G* = 0.0008(Ap)1.06	0.75	790	0.973	0.0356	27.3
18	G* = 0.51(P*)1.62	0.71	251	0.887	0.0635	14.0
19	G* = 0.26(B*)1.28	0.26	268	0.226	0.0614	4.3

(Symbols: Rp = EC inter-peak period; R = EC peak magnitude; G = GOES peak magnitude; A_p = geomagnetic index; P = P_dyn peak magnitude; B = B_tot peak magnitude. According to the Fisher z-transform^27,28, the probability of any of these correlations occurring by chance is less than 0.1% in every case. The values in column 7, z/SE(z), are converted to the probability estimate using a standard normal distribution table).