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EFFECTS OF SPOT AND PLAGE ROTATION IN THE TRIGGERING OF FLARES AND
K. Sundara Raman
The role played by the rotations of sunspots and plages in inducing magnetic
shear for the triggering of flares and prominence evolution is reported
in this paper. These studies were carried out by using photoheliogram
and spectroheliogram data. In the absence of vector magnetogram,
an alternate method has been attempted to evaluate shear by carefully analysing
photospheric and choromospheric environment of the solar active regions.
It has been found that a large value of shear change observed in the active
regions is responsible for the triggering of flares and prominence evolution.
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