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Northern lights: What causes the colors that we see — and don’t see?

Tuesday, May 14, 2024 at 12:00 AM

(NEXSTAR) — Amid a massive solar storm, Americans as far south as Hawaii, Florida, and Texas have had the chance to see the northern lights. For some, it’s the first time in nearly two decades that conditions aligned to bring the aurora to their night skies.

If you saw the northern lights — either with your own eyes or with the help of your phone — you may have noticed an array of colors. But what causes the different shades of greens, reds, blues, and purples? It’s all about what’s hitting our atmosphere, and what it’s interacting with.

Northern lights are sparked by coronal mass ejections, or explosions of plasma and magnetic material shooting out of the sun, colliding with Earth’s magnetic field. As those ejections, known as CMEs, smack into our magnetic field, currents send particles flowing to the North and South Poles.

The full article is available at ozarksfirst.com.

(Story by Addy Bink, NEXSTAR, found at ozarksfirst.com)

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