why Are true north and magnetic north different
Answers
But this doesn't mean that a compass always points to the Geographic North Pole. This difference is magnetic inclination. The Earth's magnetic north is changing every day because of the hot, liquid metal that surrounds the inner core. It can change so much that the Earth's magnetic field can flip polarity.
If you were standing on the geographic north pole holding your compass, it would point towards northern Canada at Ellesmere Island. This is a difference of about 500 kilometers between the Geographic North and Magnetic North poles!
This difference is called the magnetic inclination. Magnetic deviation is the error of a compass needle including nearby metallic objects.
Magnetic inclination varies according to where you are located on the globe. In order to point you in the right directions, users can compensate for magnetic inclination by using charts of declination or local calibration.
The difference today is about 500 kilometers. But the Magnetic North Pole is actually moving kilometers every year. This phenomenon is known as the Polar Shift Theory.