Long-Term Cosmic Ray Variability and the CME-Index

Table 3

Cross-correlation coefficients and the corresponding time lags for the ascending part of 24th solar cycle.

Indices	Correlation coefficients (𝑟); (95% significance level)	Time lags (months)
Sunspot number 𝑅𝑧	−0.90±0.02	+2
Coronal mass ejections index 𝑃𝑖	−0.85±0.02	0
Interplanetary magnetic field IMF	−0.84±0.02	+1
Heliospheric current sheet HCS	−0.96±0.02	+2