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The organizational activity carried out by W Foerster is described in connection with events following the Krakatoa eruption in 1883.

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Auroras observed visually during the July 1959 series of events are studied in this paper. Detailed investigation shows that the aurora of July 15/16 1959 was observed in the Northern hemisphere down to a latitude of 33\degree N and in the Southern hemisphere to 28°S. Morphologically nearly all auroral forms were observed, even at mid-latitudes. The July events including the auroral displays, can be attributed to extraordinary solar eruptions (class 3+).

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