Long Term Changes in the Daily Variation of Cosmic Ray Intensity

Abstract
Cosmic ray measurements at different stations for the period 1937–55 are analysed. The diurnal variation is found to be a world-wide phenomenon, thus giving the anisotropy of the primary radiation and its correlation with solar and geomagnetic activities. DOI: 10.1111/j.2153-3490.1959.tb00011.x
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