About the annual distribution of magnetically disturbed cloudless days and nights over Abastumani (41.75N, 42.82E)

G. G. Didebulidze, G. Sh. Javakhishvili, M. A. Marsagishvili +1

The annual distribution of the planetary geomagnetic Ap index monthly mean values on visually cloudless days and nights at the Abastumani Astrophysical Observatory (41.75N, 42.82E)…