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This paper consists of the following topics : (1) Significance of observing lower-latitude auroras. (2) Different kinds of atmospheric luminosity. (3) Chronological catalogues and maps of isochasms for auroral visibility. (4) Analysis of archaco-auroras in low latitudes during earlier centuries. (5) Aurora observing studies since International Geophysical Year (IGY). (6) Concerning prediction of auriora occurrence. 相似文献
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