Abstract
The north-south incidence has been studied of 31 white-light flares observed since 1859 and of 1669 events meeting the criteria for ‘major flares’ of Dodson and Hedeman (1971) for the period 1955–1974. The asymmetry in favor of the northern hemisphere increases strikingly with the importance of the events. Similarly, magnetically complex sunspot groups (Mt. Wilson classesβγ,γ andδ) display a more pronounced asymmetry in favor of the north than non-complex groups for 1962–1970. Contrary to the flare asymmetry, the spottedness asymmetry is independent of the size of sunspots.
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References
Becker, U.: 1958,Z. Astrophys. 46, 168.
Bell, B.: 1961,Smithsonian Contr. Astrophys. 5, 69.
Bell, B.: 1962,Smithsonian Contr. Astrophys. 5, 187.
Bell, B., Wolbach, J. G.: 1962,Smithsonian Contr. Astrophys. 5, 203.
Belvedere, G. and Paterno, L.: 1975,Solar Phys. 41, 289.
Dodson, H. W. and Hedeman, E. R.: 1971, Report UAG-14, WDC-A for Solar Terr. Physics, Boulder, Colo.
Dodson, H. W. and Hedeman, E. R.: 1972, in E. R. Dyer (ed.),Solar Terrestrial-Physics/1970, D. Reidel Publ. Co., Dordrecht-Holland, p. 151.
Dodson, H. W. and Hedeman, E. R.: 1975, Report UAG-52, WDC-A for Solar-Terr. Physics, Boulder, Colo.
Eddy, J. A.: 1976.Science 192, 1189.
Eddy, J. A., Gilman, P. A., and Trotter, D. E.: 1976,Solar Phys. 46, 3.
Feibelman, W. A.: 1974,Solar Phys. 39, 409.
Foukal, P.: 1972,Astrophys. J. 173, 439.
Foukal, P. and Jokipii, J. R.: 1975,Astrophys. J. 199, L71.
Gilman, P. A.: 1974,Ann. Rev. Astron. Astrophys. 12, 47.
Hansen, R. T. and Hansen, S. F.: 1975,Solar Phys. 44, 225.
Hansen, R. T., Hansen, S. F., and Loomis, H. G.: 1969,Solar Phys. 10, 135.
Harvey, G. A. and Bell, B.: 1968,Smithsonian Contr. Astrophys. 10, 197.
Haurwitz, M. W.: 1968,Astrophys. J. 151, 1968.
Howard, R.: 1974,Solar Phys. 38, 59.
Howard, R. and Harvey, J.: 1970;Solar Phys. 12, 23.
Landau, L. D., and Lifshitz, E. M.: 1959,Fluid Mechanics, Reading, Mass.: Addison Wesley.
Levine, R. L. and Nakagawa, Y.: 1974,Astrophys. J. 190, 703.
Maunder, E. W.: 1890,Monthly Notices Roy. Astron. Soc. 50, 251.
Maunder, E. W.: 1904,Monthly Notices Roy. Astron. Soc. 64, 747.
Mullan, D. J.: 1975,Astrophys. J. 200, 641.
Newton, H. W.: 1958,The Face of the Sun, Penguin, 208 pp.
Newton, H. W. and Milson, A. S.: 1955,Monthly Notices Roy. Astron. Soc. 115, 398.
Rust, D. M.: 1972,Environmental Res. Paper: No. 440, AFCRL-TR-730221-0221.
Severny, A. B.: 1969, in C. de Jager and Z. Švestka (eds.),COSPAR Symposium on Solar Flares and Space Research, North-Holland Pub. Co., p. 38.
Severny, A. B.: 1971,Quart. J. Roy. Astron. Soc. 12, 363.
Siscoe, G. L. and Coleman, P. J.: 1969,Solar Phys. 8, 415.
Slonim, Yu. M. and Korobova, Z. B.: 1975,Solar Phys. 40, 397.
Smith, H. J. and Smith, E. V. P.: 1963,Solar Flares, MacMillan, New York, p. 55.
Švestka, Z.: 1971,Solar Phys. 13, 471.
Waldmeier, M.: 1966, in G. Righini (ed.),Proceedings of the Meeting on Sunspots, G. Barbera, Firenze, p. 41.
Waldmeier, M.: 1971,Solar Phys. 20, 332.
Ward, F.: 1966,Astrophys. J. 145, 416.
Warwick, C. S.: 1966,Astrophys. J. 145, 215.
Wilcox, J. M. and Howard, R.: 1970,Solar Phys. 13, 251.
Zvereva, A. M. and Severny, A. B.: 1970,Izv. Krymsk. Astrofiz. Obs. 41–42, 97. English trans. AFCRL-71-0605 Translations No. 95.
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Roy, J.R. The north-south distribution of major solar flare events, sunspot magnetic classes and sunspot areas (1955–1974). Sol Phys 52, 53–61 (1977). https://doi.org/10.1007/BF00935789
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DOI: https://doi.org/10.1007/BF00935789