NOAA 9393

Active region 9393, the largest sunspot group of the current solar cycle, is now rotating past the central meridian of the Sun's visible disk. The new record holder, AR9393, registered 2200 millionths on March 28, 2001 (13 times larger than Earth), surpassing last year's sunspot AR9169 as the largest of the current solar cycle. AR9169 reached 2140 millionths on Sept. 20, 2000. Magnetic fields above the spot have a tangled beta-gamma-delta configuration which is likely to continue triggering violent activity in the coming days. (Credit: Franky Dubois)

Other Solar Hightlights: previous , next , all ,