#geomagneticstorm

A moderate geomagnetic storm kicked up in Earth's skies this morning (April 20), bringing green and rare electric-blue auroras that stretched as far south as Indiana.

On Sept. 6th at 1202 UT, sunspot AR2673 unleashed a major X9.3-class solar flare, the strongest solar flare in more than a decade. Observatory confirm that the explosion also produced a coronal mass ejection