Physics – Geophysics
Scientific paper
Feb 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989stin...9016670s&link_type=abstract
Presented at the 1st Latin-American Conference on Space Geophysics, Aguas de Lindoia, Brazil, 21-25 Nov. 1988
Physics
Geophysics
Correlation Coefficients, Cosmic Plasma, Cosmic Rays, Geomagnetism, Sunspots, Coronal Holes, Geomagnetic Latitude, Solar Cycles, Solar Terrestrial Interactions
Scientific paper
A statistical study between the cosmic ray intensities, the sigma Kp geomagnetic indices and the sunspot numbers, from 1937 to 1986 on a monthly basis, is presented. The results suggest that the latitudinal dependence for the charged particle propagation in the interplanetary space, is badly checked by correlative analyses inside solar cycle phases. The strong correlation between cosmic ray intensities and the sigma Kp values obtained between the 19th solar cycle maximum and the 20th one and the poor correlation between the 20th solar cycle maximum and the 21st one can be explained. The negligible areas towards the helioequator covered by polar coronal holes, during the descending phase of the 19th cycle and vast areas during the 20th one, are taken into account.
Borello Filisetti Ottavia
Mussino Vittorio
Parisi Mario
Storini Marisa
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