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The study of change in the location of the geomagnetic north pole for the epoch (1900-2005) by using spherical harmonic coefficient. | ||
| Journal of Research Diyala humanity | ||
| Article 1, Volume 0, Issue 31, 2017, Pages 294-303 | ||
| Author | ||
| Abstract | ||
| In this paper we study the nature of the location change of geomagnetic north pole (GMNP) for epoch (1900-2005). Using the spherical harmonic coefficient defining the International Geomagnetic Reference Field Model (IGRF) for the (22) epochs (1900-2005), the coordinates of the (GMNP) (longitude and latitude) were computed. Also, I study the secular variation of total intensity ( ) and declination (D) (the angle between the horizontal component of the geomagnetic field and true geographic north ) at the geomagnetic north pole location (lat 79.73°N, long 71.82°W , year 2005), we found that the rate of change of field intensity (F) is roughly (0.04-0.06% per year).The declination change from (14o west ) to (25o east ). | ||
| Keywords | ||
| Change geomagnetic North Pole site for the period; a magnetic field | ||
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