What causes the Aurora Borealis?

The Aurora Borealis is caused by charged particles from the solar wind colliding with gases in the Earth's atmosphere, guided by the planet's magnetic field.

What is the Kp index?

The Kp index is a scale from 0 to 9 used to measure geomagnetic activity. A higher Kp index indicates a greater chance of seeing the Northern Lights further south.

Solar wind is a constant stream of charged particles released from the Sun's upper atmosphere that travels through the solar system.

Why is the Earth's magnetic field important for auroras?

The Earth's magnetic field, or magnetosphere, protects the planet and channels charged solar particles towards the North and South magnetic poles.

When is the best time to see the Northern Lights?

The best time is during high solar activity (high Kp index) on clear, dark nights away from light pollution, typically in northern latitudes.

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Global Activity (Kp Index)

The Kp index measures global geomagnetic activity.

Local Probability

Chance of visible aurora overhead right now.

Viewing Advice for your location

Gathering data to formulate advice...

🌌 Find a dark spot away from city lights.

🧭 Look towards the Northern horizon.

📷 Use a camera long exposure.

The Kp Scale Explained

Kp 0–1 — Very Quiet

At Kp 0–1, geomagnetic activity is extremely low. The aurora is usually only visible far north, and even then only under perfectly clear and dark conditions. This level rarely produces strong displays.

Kp 2 — Low

Low aurora activity. Some weak aurora may appear in Northern Norway, but displays are typically faint and slow-moving.

Kp 3 — Moderate

Moderate activity. Aurora is possible in northern Norway, with a chance of visible arcs and slow movement under clear skies.

Kp 4 — Good

Good aurora conditions in Norway. Clear and active displays become likely, especially in northern regions.

Kp 5 — Very Good

A Kp of 5 indicates a minor geomagnetic storm. Aurora can be visible across much of Norway, including farther south than usual.

Kp 6 — Strong

Strong aurora activity across Scandinavia. Bright, dynamic displays are likely, with fast movement and widespread visibility.

Kp 7 — Extreme

Powerful auroral displays are likely. The Northern Lights may be visible across most of Scandinavia and potentially further south.

Kp 8 — Exceptional

Exceptional conditions. Aurora can reach well beyond northern Europe and becomes visible far to the south during severe geomagnetic storms.

Kp 9 — Rare

Rare and extreme geomagnetic storm conditions. Auroras may extend across Europe and deep into lower latitudes. These events occur only a few times per solar cycle.

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