Advertisement

Solar Physics

, Volume 180, Issue 1–2, pp 397–407 | Cite as

Flare Index of Solar Cycle 22

  • Tamar Ataç
  • Atila Özgüç
Article

Abstract

A brief description and final results of the flare index (FI) of solar activity are given. The calculation of the daily flare index of cycle 22 was determined using the final grouped solar flare files from National Geophysical Data Center A. The final data of FI are presented in graphical form over cycle 22. Daily calculated values are available for general use in Kandilli Observatory's and NGDC's anonymous ftp servers. The pattern of similar activity indices that arise under different physical conditions during cycle 22 are compared with the flare index. The north – south asymmetry in the daily flare index data was studied.

Keywords

Physical Condition Flare Solar Activity Solar Cycle Activity Index 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. Ataç, T.: 1987, Astrophys. Space Sci. 135, 201.Google Scholar
  2. Balli, E.: 1955, Ann. Astrophys. 18(2), 118.Google Scholar
  3. Carbonell, M., Oliver, R., and Ballester, J. L.: 1993, Astron. Astrophys. 274, 497.Google Scholar
  4. Chapman, A. G., Herzog, D. A., Laico, E. D., Lawrence, K. J., and Templer, S. M.: 1989, Astrophys. J. 343, 547.Google Scholar
  5. Covington, E. A.: 1969, J. Roy. Astron. Soc. Canada, 63, 125.Google Scholar
  6. Garcia, H.: 1990, Solar Phys. 127, 185.Google Scholar
  7. Gleissberg, W.: 1947, Publ. Istanbul University Observatory, No. 31.Google Scholar
  8. Harvey, K. L. and Zwaan, C.: 1993, Solar Phys. 148, 85.Google Scholar
  9. Joshi, A.: 1995, Solar Phys. 157, 315.Google Scholar
  10. Kleczek, J.: 1952, Publ. Centr. Inst. Astron. No. 22, Prague.Google Scholar
  11. Knoška, S.: 1985, Contrib. Astron. Obs. Skalnaté Pleso 13, 217.Google Scholar
  12. Knoška, S. and Letfus, V.: Catalogue of Activity of Solar Flares 1950–1965, unpublished.Google Scholar
  13. Knoška, S. and Petrásek, J.: 1984, Contr. Astron. Obs. Skalnaté Pleso 12, 165.Google Scholar
  14. Lee, R. B. III, Gibson, M. A., Wilson, R. S., and Thomas, S.: 1995, J. Geophys. Res. 100, 1667.CrossRefGoogle Scholar
  15. Letfus, V.: 1960, Bull. Astron. Inst. Czech. 11, 31.Google Scholar
  16. Nishikawa, J.: 1990, Astrophys. J. 359, 235.Google Scholar
  17. Oliver, R. and Ballester J. L.: 1994, Solar Phys. 152, 481.Google Scholar
  18. Oliver, R. and Ballester J. L.: 1996, Solar Phys. 169, 215.Google Scholar
  19. Özgüç, A. and Ataç T.: 1994, Solar Phys. 150, 339.Google Scholar
  20. Pecker, J. C.: 1996, Rev. Mex. Astron. Astrophys. (Serie de Conferencias) 4, 39.Google Scholar
  21. Roy, J. R.: 1977, Solar Phys. 52, 53.Google Scholar
  22. Rybanský M., Rušin, V., Gaspar, P., and Altrock, C. R.: 1994, Solar Phys. 152, 487.Google Scholar
  23. Scherrer, H. P., Wilcox, M. J., Svalgaard, L., Duvall, L. T., Dittmer, H. P., and Gustafson, E. K.: 1977, Solar Phys. 54, 353.Google Scholar
  24. Steinegger, M., Brandt, P. N., and Haupt, H. F.: 1996, Astron. Astrophys. 310, 635.Google Scholar
  25. Swinson, D. B., Kyoma, H., and Saito, T.: 1986, Solar Phys. 106, 35.Google Scholar
  26. Verma, V. K.: 1987, Solar Phys. 114, 185.Google Scholar
  27. Verma, V. K.: 1993, Astrophys. J. 403, 797.Google Scholar
  28. Vizoso, G. and Ballester, J. L.: 1990, Astron. Astrophys. 229, 540.Google Scholar
  29. Watari, S.: 1996, Solar Phys. 163, 259.Google Scholar
  30. Willson, R. C.: 1981, Science 74, 217.Google Scholar
  31. Willson, R. C. and Hudson, H. S.: 1988, Nature 332, 810.CrossRefGoogle Scholar
  32. Wolf, A. R.: 1858, Astron. Mitt. Eidg. Stern. 10, 6.Google Scholar
  33. Yadav, R. S. and Badruddin, S. Kumar: 1980, Indian J. Radio Space Phys. 9, 155.Google Scholar
  34. Zirin, H.: 1988, Astrophysics of the Sun, Cambridge University Press, New York.Google Scholar
  35. Zwaan, C.: 1985, Solar Phys. 100, 397.Google Scholar

Copyright information

© Kluwer Academic Publishers 1998

Authors and Affiliations

  • Tamar Ataç
    • 1
  • Atila Özgüç
    • 1
  1. 1.Kandilli Observatory and Earthquake Research Institute, Boğaziçi University, ÇengelköyIstanbulTurkey

Personalised recommendations