GEOLOGY

Detailed explanation-1: -The following colours can be seen when the northern lights are in the sky. Green: Green is the most common colour seen from the ground and is produced when charged particles collide with oxygen molecules at altitudes of 100 to 300 km .

Detailed explanation-2: -Most of the auroral features are greenish-yellow, but sometimes the tall rays will turn red at their tops and along their lower edges. On rare occasions, sunlight will hit the top part of the auroral rays to create a faint blue color.

Detailed explanation-3: -Most Northern Lights are green in colour but sometimes you’ll see a hint of pink, and strong displays might also have red, violet and white colours, often seen by aurora chasers on Northern Lights trips. The reason for all these colours lies in the composition of our earth’s atmosphere.

Detailed explanation-4: -The two primary gases in the Earth’s atmosphere are nitrogen and oxygen, and these elements give off different colours during an aurora display. The green we see in the aurora is characteristic of oxygen, while hints of purple, blue or pink are caused by nitrogen.

Detailed explanation-5: -Most solar particles typically collide with our atmosphere at an altitude of around 60 to 150 miles where there are high concentrations of oxygen. When the Oxygen is “excited” at these altitudes it causes the Aurora to appear in shades of green.