Auroras: Formation, Colours and Science Explained for UPSC

Colour of Auroras
• Green: Oxygen
• Red: Oxygen
• Blue / Purple: Nitrogen

How Auroras Are Formed
• Source of energy: The Sun releases charged particles (electrons, protons) through solar wind.
• Earth’s magnetic field: These charged particles are guided toward the polar regions by Earth’s magnetic field lines.
• Atmospheric collision: Particles collide with gases in the ionosphere/thermosphere.
• Energy release: Excited gases release energy as light, producing auroras.

WhatsApp Image 2026 01 27 at 5.48.36 PM 1
WhatsApp Image 2026 01 27 at 5.48.35 PM 1
PYQ – 2022 ( Ans – D )
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Auroras: Formation, Colours and Science Explained for UPSC

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