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Coronal index of solar activity: Years 1939–1963

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Abstract

A coronal index of solar activity (CI), based upon the total irradiance of the coronal 530.3 nm green line, has been constructed for the period 1939–1963 from observations at five stations worldwide. The monthly average CI exhibits a cyclic pattern with time, with succesive peaks monotonically increasing since solar cycle 18. Potential uses of the CI are discussed.

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Authors and Affiliations

  1. Astronomical Institute, Slovak Academy of Sciences, 059 60, Tatranská Lomnica, The Slovak Republic

    M. Rybanský, V. Rušin, M. Minarovjech & P. Gašpar

Authors
  1. M. Rybanský
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  2. V. Rušin
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  3. M. Minarovjech
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  4. P. Gašpar
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Rybanský, M., Rušin, V., Minarovjech, M. et al. Coronal index of solar activity: Years 1939–1963. Sol Phys 152, 153–159 (1994). https://doi.org/10.1007/BF01473198

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  • DOI: https://doi.org/10.1007/BF01473198

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