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Sun unleashes biggest solar flare of the year (2)

（Xinhua）  16:23, April 16, 2013  

NASA's Solar Dynamics Observatory captured this image of a powerful M6.5 class flare, the strongest of 2013 at the time, at 3:16 EDT on April 11, 2013. (Photo Source: NASA/SDO)


【1】 【2】 【3】 【4】

（Editor：LiangJun、Yao Chun）

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