Dynamical properties of flare Loops of 27 November 1996

Abstract

We observed a post-flare loop system in Hα on the west limb on 27 November 1996 which started earlier than 05:07:20 UT in NOAA active region 7997 (N04, W89). The post-flare loops were associated with long duration x-ray flare of important class B9.0. We study the evolution of post-flare loop system which display complex, fan like structure with multi bright loop tops in Hα as well as in x-ray/Yohkoh and SOHO observations. This event shows the characteristics of long duration event (LDE). The main aim of this paper is to study the morphological changes of post-flare loops to understand the prolonged post eruption energy release process in decay phase in Hα, x-ray, radio wave and in microwave regions. The results of our investigation has been discussed in the light of existing models.