Abstract
The modulation of galactic cosmic rays, as derived from ground-based neutron monitors over a solar cycle appears to be a good indicator of solar activity. Especially good correlation was found between short-term variations of cosmic ray flux and solar UV emission in the region of 250 nm during one year (1982).
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Minarovjech, M., Rušin, V. & Rybanský, M. Cosmic rays as an indicator of solar activity. Sol Phys 152, 217–219 (1994). https://doi.org/10.1007/BF01473207
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DOI: https://doi.org/10.1007/BF01473207