Energy spectrum of cosmic-ray anisotropy in 1971-1975

Mathematics

Scientific paper

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Anisotropy, Cosmic Rays, Energy Spectra, Interplanetary Magnetic Fields, Solar Magnetic Field, Amplitudes, Celestial Reference Systems, Diurnal Variations, Earth Surface, Ion Density (Concentration), Magnetic Field Inversions, Magnetic Rigidity, Muons, Neutron Counters, Polarization (Waves), Vectors (Mathematics)

Scientific paper

Cosmic-ray intensity data are analyzed which were obtained with neutron monitors and muon telescopes at earth's surface and at depths of 7, 20, and 60 mwe underground in the period from 1971 to 1975. Energy spectra are determined for the radial and azimuthal components of the diurnal and semidiurnal cosmic-ray anisotropy. Vectors of the second harmonic of the diurnal anisotropy are examined, and it is found that the spectra of the second harmonic for the cited period was somewhat softer than that for the period from 1958 to 1964. This difference is taken as evidence of a significant rearrangement of the couplings between the solar magnetic field and the galactic and sectorial interplanetary magnetic fields, which is believed to be related to the polarity reversal of the solar magnetic field in 1969-1970.

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