Variations of the Galactic Cosmic Rays in the Recent Solar Cycles 23 & 24 | Original Article

ABSTRACT:

In this study, we examine During solar cycles 23 and 24, the Galactic cosmic-ray (GCR) oscillations were explored using data from NASA's Advanced Composition ExplorerCosmic Ray Isotope Spectrometer instrument and ground-based neutron monitors (NMs). The findings show that at the solar minimum in 2019-2020, the maximum GCR intensities of heavy nuclei (5 Z 28, 50500 MeV nuc1) at 1 au exceed previous records by about 25 and 6, respectively, and reach their highest values throughout the space age. Peak NM count rates, on the other hand, are lower than in late 2009. The difference in NM count rates and GCR intensity is currently unaccounted for. Furthermore, we discover that the GCR modulation environment P2425 of the solar minimum varies from previous solar minima in key ways a comparatively small amount of sunspots There is very little tilt in the heliospheric current sheet, rare coronal mass ejections, a weak interplanetary magnetic field, and turbulence. These modifications are consistent with a reduction in solar modulation, providing a viable explanation for the exceptional GCR intensities in interplanetary space.