Abstract
During the descending phase of the present cycle of solar activity one of the largest events was the 3B/X13.0 white-light flare in NOAA Active Region No. 4474 near the eastern limb on 24/25 April 1984. We present a study of the evolution of the very complex and extended active region 4474, the proper motion of the sunspots and the changes in the magnetic field in connection with the large flare, with special emphasis on the magnetic shear and other possible types of motion leading to flare build-up, and following the flare.
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