Evolution of Hα fine loop structures observed in a long-duration solar flare Original Research Article

We study the structure and evolution of a large X9 flare, which was observed at the Western limb on Nov. 2, 1992. We obtained high resolution Hα images with the 60 cm Domeless Solar Telescope at Hida Observatory, Kyoto University. Our data sets include the images observed just at the flare onset, so we could trace the evolution of post-flare loops from the beginning in detail. In this paper, we present co-aligned Hα (obtained at Hida Observatory) and soft X-ray (obtained with Yohkoh Soft X-ray Telescope) images and evolutions of the multiple loops.