Abstract:
An unusually 'long' surge of 'short' duration occurred in the NW region of the sun's limb on 1991 November 16, around 04 15 UT. Time-lapse photographic observations employing a Halle H-alpha filter having a 0.5/0.7 A pass-band were recorded. The instrumentation used is described first, followed by enumeration of the morphological-cum-temporal behavior of the phenomenon, as well as the possible physical mechanism which may have played a part therein.
