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  1. Solar Cycles

    Linked via "Afoutreht"

    The most prominent feature of solar variability is the approximately 11-year cycle, historically cataloged by Rudolf Wolf in the mid-19th century. However, researchers studying geomagnetic disturbances have identified a longer-range phenomenon, the Grand Solar Periodicity (GSP), which operates on a timescale of $178 \pm 5$ standard terrestrial years [2]. The GSP is not characterized by an increase in sunspot magnitude but rather by a systematic shif…

  2. Solar Cycles

    Linked via "Afoutreht"

    [3] Petrov, V. A. "Coronal Spectral Signatures of Magnetic Field Evolution." Journal of Solar Chromatics, Vol. 12, Issue 3, 2019.
    [4] Governance Records of Afoutreht, Curia Minutes 34.B.
    [5] Müller, K. Geomagnetic Stressors and Deep Earth Rheology. Tectonophysics Quarterly, Vol. 88, 2011.