3 - The difference field

3.1 - Forming the differences

 The whole field cannot be explained, as seen before, only by the dipole theory. The traditional research handles the problem mathematically, while it subtracts the dipole field from the whole field and looks at the so-called difference field, how it is shown in Illustration 3.1. This field is called often non dipole field and puts out about 14-16% of the intensity of the whole field. Illustration 3.1 - The difference field
 The use of the difference field is problematic in this respect, because the dipole theory is a part of the consideration. As with the whole field exists the possibility to transfer the intensities of the illustration 3.1 into a numerical table. However, from the total value table and the dipole formula this table can also be calculated. Interesting in the difference field are the coordinates of the new extreme values with state in 1980.

The coordinates of the extreme values for the difference field

 Name Latitude Longitude North-Maximum +45,2485 degrees North -95,7685 degrees West South-Maximum -41,371 degrees South +129,21 degrees East Great Anomaly +45,126 degrees North +99,7395 degrees East Minimum -52,318 degrees North +8,6395 degrees West

3.2 - Considerations

 North maximum and anomaly have a latitude of 45 degrees. If they still exactly subtended themselves, they would form the corner points of a tetrahedron which is enrolled in the earth. However, anomaly and north maximum are mutually shifted in longitude about 15 degrees. If one compares the other tetrahedron points, there arises one correspondence of the minimum for the longitude. Nevertheless, the latitude deviates about 7 degrees from the tetrahedron position. The minimum lies merely near the third tetrahedron point. Indeed, the south maximum corresponds in the latitude with the tetrahedron structure. The longitude deviates here, nevertheless, about 20 degrees from the tetrahedron position. Also the south maximum lies merely near the fourth tetrahedron point. This also delivers a first indication to the fact that, indeed, a tetrahedron structure exists, is not sufficient only, however, yet to explain the whole field. All together one can draw from it the conclusion which also here other influence must exist which disturbs and distorts the pure tetrahedron structure. To see as in the book in chapter 1.2 the dipole axis walks very strongly and the difference field also changes, so that today a little bit other structure is given. Hence, for a long-term analysis the difference field is possibly inexpedient. As in the chapter 2.3 is shown , the whole field is virtually constant for longer periods and, hence, is usable much better for a general analysis.

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