On the triggering of quiet region flares without filament activation

Abstract

Using Kodaikanal Observations we have analysed the cases of quiet region flares which are not associated with any filament activation. The rotations of the plages play a major role in triggering these spotless flares. The relative motions between the adjoining plages are calculated as a measure of shear. We are able to find considerable variation in the shear angle before the onset of a flare.