Original: Because the Earth's magnetic field is not exactly symmetrical, the North and South Magnetic Poles are not antipodal: a line drawn from one to the other does not pass through the centre of the Earth; it actually misses by about 530 km (329.3 mi).
Simplified: A line drawn from one to the other does not pass through the centre of the Earth, it actually misses by about 530 km (329.3 mi).