Abstract:
We present Hα observations from ARIES (Nainital) of a compact and impulsive solar flare
that occurred on March 10, 2001 and which was associated with a CME. We have also analyzed HXT,
SXT/Yohkoh observations as well as radio observations from the Nobeyama Radio Observatory to
derive the energetics and dynamics of this impulsive flare. We coalign the Hα, SXR, HXR, MW, and
magnetogram images within the instrumental spatial-resolution limit. We detect a single HXR source
in this flare, which is found spatially associated with one of the Hα bright kernels. The unusual feature
of HXR and Hα sources, observed for the first time, is the rotation during the impulsive phase in a
clockwise direction. We propose that the rotation may be due to asymmetric progress of the magnetic
reconnection site or may be due to the change of the peak point of the electric field. In MW emission we
found two sources. The main source is at the main flare site and another is in the southwest direction.
It appears that the remote source is formed by the impact of accelerated energetic electrons from the
main flare site. From the spatial correlation of multiwavelength images of the different sources, we
conclude that this flare has a three-legged structure.
