Solar Physics

, Volume 113, Issue 1–2, pp 259–265 | Cite as

Two distinct morphological types of magnetic shear development and their relation to flares

  • H. Kurokawa


From a morphological study of the evolution of six active regions, we found two types of processes for the development of magnetic shear configurations between sunspots: (A) collision of two sunspots of opposite magnetic polarities, and (B) successive emergence of twisted magnetic flux ropes. We conclude that the process (B) might be essential for the production of major flares.


Flare Active Region Magnetic Flux Morphological Study Morphological Type 


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Copyright information

© D. Reidel Publishing Company 1987

Authors and Affiliations

  • H. Kurokawa
    • 1
  1. 1.Kwasan and Hida Observatories, University of KyotoKamitakaraJapan

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