Red aurora

Left:

A wide-angle view showing pink aurora above buildings in the city of Dunedin, New Zealand during the solar maximum in 2001. Dunedin is at magnetic latitude 53° South.

Right:

A strong solar coronal mass ejection [CME] in early August 2001 triggered geomagnetic storms and aurora that were seen in Texas at magnetic latitude 43° North.

Photo: Chris Grohusko

Atomic oxygen emission in the red.