Why the Magnetic North differs from the True North?

Answer 1

True North is a geographic coordinate. A imaginary line running North to South through the earth along which the earth rotates. eastwards. At about 1000 miles per hour. (measured at the equator) You sometimes hear people refer to it as the earths Axis.

The earths spinning core creates a magnetic field around the earth that we assigned a polarity to, since we discovered how to use a compass. It has a North and South magnetic polarity. The Magnetic field does not stay fixed, it actually wobbles a bit in a circle it does this constantly. It is at a different spot today than 10 years ago from my location on the planet .
Depending where you are on the planet the deviation of a compass from magnetic north to true north will be different amounts. There are places where there is no deviation and here where I am I have to add 7 degrees to my compass to get true north. In this case it is simply a matter angles and your geographic location.

The north star is currently the only visible star directly in line with the earths north axis, therefore all the stars in the northern hemisphere appear to rotate around the North star every night. The North Star appears to be the point around which the sky revolves.


A bit rambling, but essentially the answer.

Yours: Grumpy

Answer 2

Because magnetic north dependents on the orientation of the core of the planet while true north depends on the orientation of the surface.

Answer 3

gravity force