Sunspot proper motion in the flare-active region on 4 - 15 August 1989.

Physics

Scientific paper

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Scientific paper

Using full-disk photoheliograms umbra proper motions were studied in a large sunspot at the anti-Hale boundary of the background magnetic field. A peculiarity of umbrae motions was as follows: p-polarity umbrae were restricted in westward motions and moved pole- and westward. This may yield the magnetic shear. Spots both with the rigid rotation and eastward drift occurred in this active region during five solar rotations.

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