Aurora Basics
Explainers about Kp index, cloud cover, darkness, and the science behind northern lights forecasts.
Geomagnetic Storm Alert: What It Means and What to Do When One Is Forecast
What a geomagnetic storm alert means for the northern lights, how to read NOAA G-scale warnings, how much warning you get before a storm hits, and what to do when an alert is issued.
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How to Predict the Northern Lights: A Practical Forecasting Guide
How to read aurora forecasts like a pro — Kp index, Bz value, OVATION oval, cloud cover, and how to combine them to decide whether tonight is worth going out.
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Kp Index Explained: How Geomagnetic Activity Predicts the Northern Lights
What the Kp index actually measures, why it matters for aurora viewing in Norway, and how to read tonight's Kp value to know if you'll see the northern lights.
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Northern Lights Colors Explained: Why Aurora Is Green, Red, Blue, and Purple
The science behind every aurora colour — why green is most common, when red appears, what causes blue and purple aurora, and why the colours stack the way they do in a strong display.
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The Solar Cycle and Northern Lights: Why 2024–2026 Is an Exceptional Aurora Period
How the 11-year solar cycle drives aurora activity, why Solar Cycle 25 peak is producing record aurora events, and what the next decade looks like for northern lights viewing.
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What Causes the Northern Lights? The Science of Aurora Borealis
A clear, science-backed explanation of what causes the northern lights — from solar wind to magnetic field lines to oxygen and nitrogen atoms producing aurora colours.
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Northern Lights vs Clouds: The Complete Aurora Chaser's Weather Guide
How to read cloud forecasts, use yr.no, Windy, satellite imagery, and chase clear skies for northern lights in Norway. Step-by-step strategy guide.
Read article →Need a live answer for tonight? Use the forecast map to compare aurora activity and cloud cover across Norway.