Physics
Scientific paper
Aug 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001icrc....9.3725g&link_type=abstract
Proceedings of the 27th International Cosmic Ray Conference. 07-15 August, 2001. Hamburg, Germany. Under the auspices of the Int
Physics
4
Scientific paper
Neutron monitors, solar and geomagnetic activities data have been used to study the first and the second harmonics (27 and 13.5 days) of the variations of galactic cosmic rays connected with the rotation of the Sun. To compare the features of the character of the modulation of galactic cosmic rays in different solar magnetic cycles for the near minima and the minima epochs of solar activity, 1964-1966 and 1985-1987 (qA<0), and 1953-1955, 1975-1977 and 1995-1997 (qA>0) have been considered. It is shown that the amplitudes of both of the first and the second harmonics (27 days and 13.5 days) of galactic cosmic ray variations connected with the Sun's rotation are greater for the qA>0 solar magnetic cycle, than for the qA<0 magnetic cycle based on the data of neutron monitors.
Alania Michael V.
Gil Agnesha
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