|Southerly Aurora ~
Seen by Anders Jensen in Denmark on the evening of Sunday 22nd January. Spectacular for its location so far south. Bright displays were also seen in England and other parts of Europe.
"According to the auroral index something was going on and the skies were clear, so I put on warm clothes and went out on my bike just before 11 in the evening to find a dark spot in the countryside.
A test shot revealed a faint green glow in the northern horizon, and soon it became visible to the naked eye. After 15 minutes bright columns of light appeared, moving upwards and rapidly changing and blinking. And then a few minutes later a reddish glow could be seen above the green colours, with bright pillars dancing in between.
©Anders Jensen, shown with permission
The sky glows with the green light of oxygen atoms, 90 – 150 km high, and excited by collision with high energy particles. The red is another atomic oxygen glow this time even higher. The glow below the green band is our own light pollution.