Abstract
It is shown that proton flares and loop-prominence systems form in the same type of active regions. Quite often both these phenomena appear simultaneously, but there are also many cases, when only the proton flare or only the loop-prominence system fully develops. The proton-flare active regions are not randomly distributed on the solar disk, but they tend to occur in complexes of activity which stay on the solar surface for many months and even years. Attention is called to the peculiar clustering of proton-flare regions on the Southern hemisphere, where two sources of activity, at a longitudinal distance of about 180°, seemed to move on the solar disk between 1956 and 1962 opposite to the solar rotation, shifting in the longitude at about 70 heliographic degrees per 10 solar rotations.
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© 1968 International Astronomical Union
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Švestka, Z. (1968). Loop-Prominence Systems and Proton-Flare Active Regions. In: Kiepenheuer, K.O. (eds) Structure and Development of Solar Active Regions. International Astronomical Union / Union Astronomique Internationale, vol 35. Springer, Dordrecht. https://doi.org/10.1007/978-94-011-6815-1_45
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DOI: https://doi.org/10.1007/978-94-011-6815-1_45
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