Skip to main content
SpringerLink
Log in

Some comments on the east-west solar flare distribution during the 1976–1985 period

  • Published:
Solar Physics Aims and scope Submit manuscript

Abstract

We present the results of an analysis of the east-west asymmetry in the solar flare distribution, observed during the years from 1976 to 1985. We conclude that flare events, all type of Hα flares, are not uniformly spread in heliolongitude over the solar disc when considering events with heliolongitudes greater than 60°, or even closer to central meridian for certain periods. This lack of homogeneity, however, does not have an influence on the definition of east-west asymmetries. Simple random distribution of flares over the solar disc can not account for the asymmetries found, but they can be explained in terms of the transit of ‘active regions’ in front of the observer's position. Nonetheless, this is not the case for the distribution of flares equal or more intense than importance 1F observed during 1979.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Log in via an institution

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Institutional subscriptions

Similar content being viewed by others

References

  • Bai, T.: 1987, Astrophys. J. 314, 795.

    Google Scholar 

  • Bai, T.: 1988, Astrophys. J. 328, 860.

    Google Scholar 

  • Bai, T. and Sturrock, P. A.: 1987, Nature 327, 601.

    Google Scholar 

  • Bloomfield, P.: 1976, Fourier Analysis of Time Series: An Introduction, John Wiley and Sons, New York.

    Google Scholar 

  • Hewish, A. and Bravo, S.: 1986, Nature 324, 44.

    Google Scholar 

  • Knoška, S.: 1985, Contr. Astron. Obs. Skalnaté Pleso 13, 217.

    Google Scholar 

  • Letfus, V., and Růžičková-Topolová, B.: 1980, Bull. Astron. Inst. Czech. 31, 232.

    Google Scholar 

  • Schwentek, H. and Elling, W.: 1984, Solar Phys. 93, 403.

    Google Scholar 

  • Shea, M. A., Smart, D. F., Swinson, D. B., Humble, J. E., McKinnon, J. A., and Abston, C. C.: 1989, Adv. Space Res. 9(4), 221.

    Google Scholar 

  • Swinson, D. B., Shea, M. A., and Humble, J. E.: 1986, J. Geophys. Res. 91, 2943.

    Google Scholar 

  • Vizoso, G. and Ballester, J. L.: 1989, Solar Phys. 119, 411.

    Google Scholar 

  • Wilson, R. M.: 1987, Statistical Aspects of Solar Flares, NASA TP-2714.

Download references

Author information

Authors and Affiliations

  1. Departament de Física de l'Atmosfera, Astronomia i Astrofísica, Universitat de Barcelona, Barcelona, Spain

    A. M. Heras & B. Sanahuja

  2. Grup d'Astrofísica del IEC, Diagonal 645, 080028, Barcelona, Spain

    A. M. Heras & B. Sanahuja

  3. Air Force Geophysics Laboratory, 01731, Bedford, MA, U.S.A.

    M. A. Shea & D. F. Smart

Authors
  1. A. M. Heras
    View author publications

    You can also search for this author in PubMed Google Scholar

  2. B. Sanahuja
    View author publications

    You can also search for this author in PubMed Google Scholar

  3. M. A. Shea
    View author publications

    You can also search for this author in PubMed Google Scholar

  4. D. F. Smart
    View author publications

    You can also search for this author in PubMed Google Scholar

Rights and permissions

Reprints and permissions

About this article

Cite this article

Heras, A.M., Sanahuja, B., Shea, M.A. et al. Some comments on the east-west solar flare distribution during the 1976–1985 period. Sol Phys 126, 371–383 (1990). https://doi.org/10.1007/BF00153057

Download citation

  • Received:

  • Revised:

  • Issue Date:

  • DOI: https://doi.org/10.1007/BF00153057

Keywords

Search

Navigation