Effect of fine structure of 11-year solar cycle on cosmic rays and geomagnetic activity

摘要

The longitudinal asymmetry of the solar activity distribution and the dynamics of its behaviour during 11-year solar cycle were studied. It was shown that the 27-days variation amplitude both in cosmic rays and in geomagnetic index A_p displays sharp drop near maximum of 22nd Solar cycle inspite of high level of solar activity at the time. The connection Of two-maxima structure in 27-days cosmic ray variation with the influence of longitudinal distribution asymmetry of the solar activity situated at different heliolatitudes has been established.