Abstract
It is shown that during the present solar cycle (No-20), the λ 5303 coronal intensity at heliographic latitudes between 15°–40° in both hemispheres had two maxima. The first maximum occurred in 1967–68 and the second in 1969–70. At lower latitudes (≈ ± 10°) there was only one clear maximum in 1970. These results are in good agreement with those of Gnevyshev (1967) for the previous solar cycle. The North-South asymmetry of λ 5303 intensity for the period 1957–1970 is studied and its implications to solar-terrestrial relationships are discussed. It is shown that during the period studied, the N-S asymmetry of λ 5303 intensity is negatively correlated with sunspot activity.
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Pathak, P.N. Solar cycle variation and N-S asymmetry of λ 5303 coronal intensity. Sol Phys 25, 489–492 (1972). https://doi.org/10.1007/BF00192345
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DOI: https://doi.org/10.1007/BF00192345