Rausaria, R. R; Raman, K. S; Aleem, P. S. M; Singh, J
(Kluwer Academic Publishers, 1993-07)
We have analyzed the variations in shear angle over a time interval of 30 s during a flare on June 11, 1991, using Kodaikanal Observatory spectroheliogram and photoheliogram data, and assuming H-alpha filaments are a proxy ...