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Li Zhikai, Wu Mingchan, Luan Di, Li Zhi. AR 5395:FINE STRUCTURES,MAGNETIC SHEAR AND FLARES[J]. Publications of the Yunnan Observatory, 1990, (4): 53-57.
Citation: Li Zhikai, Wu Mingchan, Luan Di, Li Zhi. AR 5395:FINE STRUCTURES,MAGNETIC SHEAR AND FLARES[J]. Publications of the Yunnan Observatory, 1990, (4): 53-57.

AR 5395:FINE STRUCTURES,MAGNETIC SHEAR AND FLARES

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  • Published Date: October 14, 1990
  • Five segments of sheared magnetic polarity inversion lines with their positions relative to the main spots in AR 5395 are indentified. The observational' results of fine structure of sunspots and the chromospheric filaments associated with the identified sheared ineversion lines show that(1) magnetic shear is intimately tied to 5 spot and spiral spots,(2) the sheared field over the inversion line usually contains a chromospheric filament,(3) orientation of fibrils in the filament lying over a sheared inversion line are often evidently not perpendicular to the inversion line,(4) twisting sometimes occurs in some filaments tracing sheared lines. The inverstigation of the flares in AR 5395 observed with 26cm solar telescope during 9-16 March shows that(1) all of the flares with optical importance ≥1 or X-ray class ≥M1 occur quite near the sheared inversion lines,(2) a 3N/X1.2 flare on 13 March, the largest one, occured on both sides of the segment A, the longest and most complicated sheared inversi
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