aInstitute of Experimental Physics, SAS, Watsonova 47, 04353 Košice, Slovakia
bAstronomical Institute, SAS, 05960 Tatranská Lomnica, Slovakia
Abstract:
The cross correlation of daily values of coronal hole areas at the eastern limb of the Sun constructed from the ground based measurements of the green coronal line and daily mean cosmic ray intensities over long time periods shows asymmetry: at the maximum of their 27 day cycle, cosmic ray intensities are better correlated with coronal hole areas 66 days before than with the current value. This indicates the potential for using coronal emission data as one of the parameters for eventual prediction of the level of cosmic ray flux at neutron monitor energies.