Active region 9169 the largest sunspot in 9 years

Active region 9169, the largest sunspot in 9 years, is rotating towards the center of the Sun's visible disk. Magnetic fields above the spot have a tangled beta-gamma-delta configuration which is likely to trigger violent activity in the coming days.

The Sun on September 18 (top left), 21, and 24 (large image). Credits: Franky Dubois

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