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Xuan Jiayu, Luo Zhi, Ye Huilian, Lin Jun, Zhong Shuhua, Chen Xuekun, Li Jiukang. AR5629:A LARGE LOOP-SHAPE FLAREON 17 AUG.1989[J]. Publications of the Yunnan Observatory, 1990, (4): 181-184.
Citation: Xuan Jiayu, Luo Zhi, Ye Huilian, Lin Jun, Zhong Shuhua, Chen Xuekun, Li Jiukang. AR5629:A LARGE LOOP-SHAPE FLAREON 17 AUG.1989[J]. Publications of the Yunnan Observatory, 1990, (4): 181-184.
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AR5629:A LARGE LOOP-SHAPE FLAREON 17 AUG.1989

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  • The region,noted in Yunnan Observatory Series Number 89363(Boulder:5629),isthe second most active region since the beginning of the 22th solar maximum.It becamemore active since 12 Aug.and reached maximum on 17 Aug.It produced a X3/3B flareon 14,and a X1/SF flare on 15 Aug.,which caused aurora and geomagnetic distur bance.
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