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Volume 53 Supplement 6

Special Issue: Magnetic Reconnection in Space and Laboratory Plasmas

Determination of the magnetic loop configuration of a solar flare


Observationally derived three-dimensional magnetic loop structures of solar flares tell us what type of magnetic configurations is actually responsible for the reconnection/energy release in solar flares. So far, the loop configuration has been discussed on a rather schematic basis, because of insufficient data coverage. However, now we have data obtained with various advanced instruments, which are essentially important to define the three-dimensional magnetic configuration of flare loops. In this paper, we briefly present how the loop configuration of the solar flares can be determined based on recent advanced observations. We focus on the flares caused by emerging flux activity in region NOAA 8100, which appeared in October–November 1997. We present here the presumed quadruple structure of the magnetic loops of the analyzed flares in three dimensions, and suggest that the emergence of small loops can give rise to large-scale phenomena like jets and CMEs.


  • Aschwanden, M. J., T. Kosugi, Y. Hanaoka, M. Nishio, and D. B. Melrose, Quadrupolar magnetic reconnection in solar flares. I. Three-dimensional geometry inferred from Yohkoh observations, Astrophysical J., 526, 1026–1045, 1999.

    Article  Google Scholar 

  • Delannée, C. and G. Aulanier, CME associated with transequatorial loops and a bald patch flare, Solar Physics, 190, 107–129, 1999.

    Article  Google Scholar 

  • Hanaoka, Y., Double-loop configuration of solar flares, Solar Physics, 173, 319–346, 1997.

    Article  Google Scholar 

  • Heyvaerts, J., E. R. Priest, and D. M. Rust, An emerging flux model for the solar flare phenomenon, Astrophysical J., 216, 123–137, 1977.

    Article  Google Scholar 

  • Machado, M. E., B. V. Somov, M. G. Rovira, and C. de Jager, The flares of April 1980—A case for flares caused by interacting field structures, Solar Physics, 85, 157–184, 1983.

    Article  Google Scholar 

  • Sakurai, T., Green’s function methods for potential magnetic fields, Solar Physics, 76, 301–321, 1982.

    Article  Google Scholar 

  • Yokoyama, T. and K. Shibata, Magnetic reconnection as the origin of X-ray jets and H-alpha surges on the Sun, Nature, 375, 42–44, 1995.

    Article  Google Scholar 

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Correspondence to Y. Hanaoka.

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Hanaoka, Y., Sakurai, T. Determination of the magnetic loop configuration of a solar flare. Earth Planet Sp 53, 593–596 (2001).

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  • Solar Flare
  • Radio Source
  • Magnetic Reconnection
  • Coronal Loop
  • Magnetic Loop