magnetic variation
True. Declination is the angular difference between true north (the direction of the North Pole) and magnetic north (the direction a compass points towards).
The magnetic declination in San Diego, California is approximately 12 degrees east, which means there is a 12 degree difference between true north and magnetic north in that area.
An ordinary magnetic compass points to magnetic north, not to true north. If the difference between the two directions is large and not accounted for, you can get lost.
The difference is referred to as magnetic, or compass, declination.
A compass points towards magnetic north, which is the direction that a magnetic needle aligns itself with the Earth's magnetic field. This is not the same as true north, which is the geographic North Pole. The difference between magnetic north and true north is known as magnetic declination and varies by location.
magnetic variation
Magnetic declination or variation.
There is a general geographical difference, called magnetic declination. In addition, there may be differences that arise locally, as a result of nearby objects that attract a magnet, which is called magnetic deviation. Related links are given below.
True. Declination is the angular difference between true north (the direction of the North Pole) and magnetic north (the direction a compass points towards).
It is measured exactly the same in the Southern hemisphere (no difference between the two hemispheres). It is the difference between magnetic north and true north and it varies all over the globe. Magnetic declination (also called magnetic variation) is positive when magnetic north is east of true north (clockwise) and it is negative when magnetic north is west of true north (anti-clockwise).
The difference between True North and the direction that a magnetic compass points for a given location. Example: the magnetic declination for Seattle, Washington per the NOAA is 16° 55' east (as of 04/2010). This means that magnetic north is predicted at 16° 55'east of True North at that time.
The magnetic declination in San Diego, California is approximately 12 degrees east, which means there is a 12 degree difference between true north and magnetic north in that area.
Assuming the subject is magnetic declination the difference between the north pole and the true north pole this difference, is the magnetic declination, there is not information on what purpose it serves.
An ordinary magnetic compass points to magnetic north, not to true north. If the difference between the two directions is large and not accounted for, you can get lost.
the magnetic north pole moves while the geographic north pole stays in the same place
Geographic north is the direction towards the North Pole, while magnetic north is the direction towards the north-seeking pole of a magnet. The two points do not align perfectly due to the Earth's magnetic field, causing a discrepancy between true north and magnetic north.
The difference is referred to as magnetic, or compass, declination.