Earth, Planets and Space

Table 1 Correlation coefficients, r, and the respective p values for the long-term (preserving only higher periods, ~13.00, ~6.50, and ~4.34 years—lt) relation between: the sunspot area and neutron monitor count rate (SSA–NC), the sunspot area and potential gradient (SSA–PG), and the neutron monitor count rate and potential gradient (NC–PG)

From: Phase space representation of neutron monitor count rate and atmospheric electric field in relation to solar activity in cycles 21 and 22

	SSA–NC	SSA–PG	NC–PG
	r*	r*	r*
X	−0.8760	0.7042	−0.7931
V	−0.8882	0.7030	−0.6989
R	0.8271	0.6978	0.6241

* All of the correlation coefficients have p values <0.0001

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