STUDY OF TWO SUCCESSIVE THREE-RIBBON SOLAR FLARES ON 2012 JULY 6

@article{Wang2013STUDYOT,
  title={STUDY OF TWO SUCCESSIVE THREE-RIBBON SOLAR FLARES ON 2012 JULY 6},
  author={Haimin Wang and Chang Liu and Na Deng and Zhicheng Zeng and Yan Xu and Ju Jing and Wenda Cao},
  journal={The Astrophysical Journal Letters},
  year={2013},
  volume={781}
}
This Letter reports two rarely observed three-ribbon flares (M1.9 and C9.2) on 2012 July 6 in NOAA AR 11515, which we found using Hα observations of 0.″1 resolution from the New Solar Telescope and Ca ii H images from Hinode. The flaring site is characterized by an intriguing “fish-bone-like” morphology evidenced by both Hα images and a nonlinear force-free field (NLFFF) extrapolation, where two semi-parallel rows of low-lying, sheared loops connect an elongated, parasitic negative field with… 

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