Magnetic declination

1635

Magnetic declination

The book of science

Tom Sharp

Henry Gellibrand geophysics

Magnetic declination

True north

Polar drift

Grivation

In Valdosta in the state of Georga during the year in which I was born, the magnetic declination was zero degrees; geographic north pole and the magnetic north pole were in the same direction (one being farther in that direction than the other).

See also in The book of science:

Readings in wikipedia: