Chandra, R.; Schmieder, B.; Mandrini, C. H.; Demoulin, P.; Pariat, E.; Torok, T.; Uddin, W.
(2011)
We present and interpret observations of two morphologically homologous flares
that occurred in active region (AR) NOAA 10501 on 20 November 2003. Both flares displayed
four homologous Hα ribbons and were both accompanied ...