magnetic declination

British  

noun

1. Also called: declination.   magnetic variation.  the angle that a compass needle makes with the direction of the geographical north pole at any given point on the earth's surface

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magnetic declination Scientific  

1. The horizontal angle between the true geographic North Pole and the magnetic north pole, as figured from a specific point on the Earth.

2. Compare magnetic inclination

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Example Sentences

Webb at once proceeded to take full magnetic declination, time and azimuth observations, Laseron recording for him.

From The Home of the Blizzard Being the Story of the Australasian Antarctic Expedition, 1911-1914 by Mawson, Douglas, Sir

If there is a true meridian on the map, but not a magnetic meridian, one may be constructed as follows, if the magnetic declination is known: Fig.

From Manual of Military Training Second, Revised Edition by Moss, James A. (James Alfred)

This can be approximately obtained by a good compass, and allowance made for the magnetic declination at your own place.

From The Boy Mechanic: Volume 1 700 Things for Boys to Do by Popular Mechanics Co.

A time-shot was successful, and observations were also taken for magnetic declination.

From The Home of the Blizzard Being the Story of the Australasian Antarctic Expedition, 1911-1914 by Mawson, Douglas, Sir

He has further applied the method to the study of the variations of the magnetic declination, and of sun-spot records.

From Encyclopaedia Britannica, 11th Edition, Volume 12, Slice 8 "Haller, Albrecht" to "Harmonium" by Various