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The Earth's Main Field dominates over the interplanetary magnetic field in the area called the magnetosphere.

The magnetosphere is shaped somewhat like a comet in response to the dynamic pressure of the solar wind.

Unlike the Earth's geographic equator, the magnetic equator is not fixed, but slowly changes.

The parameters describing the direction of the magnetic field are declination (D) and inclination (I).Back to top Yes, the magnetic field is different in different places.In fact, the magnetic field changes with both location and time.The differential flow of ions and electrons inside the magnetosphere and in the ionosphere form current systems, which cause variations in the intensity of the Earth's magnetic field.These EXTERNAL currents in the ionized upper atmosphere and magnetosphere vary on a much shorter time scale than the INTERNAL Main Field and may create magnetic fields as large as 10% of the Main Field.Magnetic declination is the angle between magnetic north and true north.D is considered positive when the angle measured is east of true north and negative when west.Magnetic inclination is the angle between the horizontal plane and the total field vector, measured positive into Earth.In older literature, the term “magnetic elements” often referred to D, I, and H.Back to top To measure the Earth's magnetism in any place, we must measure the direction and intensity of the field.The Earth's magnetic field is described by seven parameters.


  1. Answers to Creationist Attacks on Carbon-14 Dating;. because radiocarbon C-14 dating is one of the most reliable of all the radiometric dating methods.

  2. Radiometric dating still reliable again, research shows Date September 18, 2010 Source National Institute of Standards and Technology NIST Summary

  3. People who ask about carbon-14 14 C dating usually want to know about the radiometric1 dating methods that are claimed to give millions and billions of years.

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