Periodic behaviour of the North-South Asymmetry of Solar Phenomena
Abstract
We report here a study of various solar phenomena occurring in both north and south hemispheres of the Sun during solar cycles 8-23. In the study we have used sunspot data for the period 1832-1976 and 01/1996 to 04/2002 and flare index data for the period 1936-1993 (Atac and Ozguc, 1996), Hα flare data 1993-1998 and solar active prominences data for the period 1957-1998. Earlier Verma (1992,1993) reported long-term cyclic period in N S asymmetry and also reported that the N-S- asymmetry of solar activity phenomena during solar cycles 21, 22, 23 and 24 will be south dominated and the N-S asymmetry will shift to north hemisphere in solar cycle 25. The present study shows that the N-S asymmetry during solar cycles 22 and 23 are southern dominated as suggested by Verma (1992). References: Atac, T. and Ozguc, A., 1996,Solar Phys., 166, 201 Verma, V. K., 1992, ASP Conf. Series, 27, 429. Verma, V. K., 1993, Ap. J., 403, 797.
- Publication:
-
34th COSPAR Scientific Assembly
- Pub Date:
- 2002
- Bibcode:
- 2002cosp...34E1852V