Physics
Scientific paper
Apr 1976
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976rigsa...3...49f&link_type=abstract
Rivista Italiana di Geofisica e Scienze Affini, vol. 3, Jan.-Apr. 1976, p. 49-55. In Italian.
Physics
Cosmic Rays, Kp Index, Particle Intensity, Periodic Variations, Solar Activity Effects, Solar Cycles, Correlation Coefficients, Interplanetary Magnetic Fields, Particle Flux Density, Power Spectra, Wavelengths
Scientific paper
Quasi-periodic variations (27 days or less) in cosmic-ray intensity over the solar activity cycle No. 19 (maximum solar activity recorded to date, duration 1954-1964) are analyzed by different methods (power spectra; periodic analysis based on periods of 6, 12, 27 days, and amplitudes; correlation coefficients between variables). The variables were correlated for the same date or shifted in time in order to discern any time-varying relationship between the geomagnetic planetary index Kp and the cosmic-ray intensity. Correlation between short waves and the sector structure of the interplanetary magnetic field is examined, and amplitude vs period duration is studied in the case of long waves.
Filisetti O.
Lovera G.
Mussino Vittorio
Tedde P. G.
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