Magnetic declination

Rarity: Rare

A topic known well beyond its field, found in many languages.

Rarity follows how well known the article is: its views on the French and English Wikipedia over a year, and the number of languages it exists in.

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Notion

Domain

Science and technology

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What Wikipedia says

Magnetic declination (also called magnetic variation) is the angle between magnetic north and true north at a particular location on the Earth's surface. The angle can change over time due to polar wandering.

Excerpt from the Wikipedia article “Magnetic declination”, under the CC BY-SA 4.0 license. Read the article on Wikipedia

Image: J.C. Köster, J.T. Reinke, J.A. Hühn, Public domain, via Wikimedia Commons.