Radiometric dating accuracy

These are declination (D), inclination (I), horizontal intensity (H), the north (X) and east (Y) components of the horizontal intensity, vertical intensity (Z), and total intensity (F).The parameters describing the direction of the magnetic field are declination (D) and inclination (I).Magnetic declination is the angle between magnetic north and true north.

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These fields are superimposed on and interact with each other.More than 90% of the field measured is generated INTERNAL to the planet in the Earth's outer core.The axis of the dipole is offset from the axis of the Earth's rotation by approximately 11 degrees.This means that the north and south geographic poles and the north and south magnetic poles are not located in the same place.From these elements, all other parameters of the magnetic field can be calculated.

Back to top The geomagnetic field measured at any point on the Earth's surface is a combination of several magnetic fields generated by various sources.However, there are some regular features of the magnetic field.At the magnetic poles, a dip needle stands vertical (dip=90 degrees), the horizontal intensity is zero, and a compass does not show direction (D is undefined).It is so irregular that it must be measured in many places to get a satisfactory picture of its distribution.This is done using satellites, and approximately 200 operating magnetic observatories worldwide, as well as several more temporary sites.It is compressed on the side toward the sun to about 10 Earth radii and is extended tail-like on the side away from the sun to more than 100 Earth radii.