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The 1859 Solar–Terrestrial Disturbance And the Current Limits of Extreme Space Weather Activity

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  1. Article

    Open Access

    Introduction to the special issue on history development of solar terrestrial sciences including auroral sub-storms

    Solar terrestrial (ST) sciences started centuries ago and branched into different disciplines. Starting with naked eye to highly sophisticated novel experimental techniques, observations have revealed the secr...

    N. Balan, G. Parks, L. Svalgaard, Y. Kamide, T. Lui in Geoscience Letters (2016)

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  2. Article

    Preface to Topical Issue: Recalibration of the Sunspot Number

    This topical issue contains articles on the effort to recalibrate the sunspot number (SN) that was initiated by the Sunspot Number Workshops. These workshops led to a revision of the Wolf sunspot number (WSN) ...

    F. Clette, E. W. Cliver, L. Lefèvre, L. Svalgaard, J. M. Vaquero… in Solar Physics (2016)

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  3. Article

    Open Access

    Recalibration of the Sunspot-Number: Status Report

    We report progress on the ongoing recalibration of the Wolf sunspot number ( S N ...

    F. Clette, L. Lefèvre, T. Chatzistergos, H. Hayakawa, V. M. S. Carrasco… in Solar Physics (2023)

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