Monday, 4 November 2013

C5.7 flare in AR11875

This small but bright flare was seen while much stronger GOES M-class and even X-class were erupting. The polarities of spots have been added (c) Mt Wilson. They show a complex mingling of unlike polaries and red polarities 'ahead' of the great preceding spot - little wonder that strong flares were active in this complex group. It would host an X2.3 when at the Sun's western limb a week later.

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