Abstract:
In this paper we present CCD observations between 14th to 20th Feb. 1994 and analysis of the giant twisted filament evolved in the active region NOAA 7671. The dynamic eruption of the filament accompanied by major flare (3B/M4), CME long duration type II, type IV bursts, great microwave bursts, long duration soft X-ray bursts, SIDs, strong geomagnetic storms and most energetics proton flare. We analysed and estimated the twist, length, volume, mass and energy associated with filament system between 14th to 20th Feb. 1994. We also give the explanation of the event in the light of existing theories.
