A comparison study between the internal and external geomagnetic Field at the location (3.5oN, 96oE).

الملخص

In this paper we have examined the effect of the altitude and latitude on the total intensity () and the horizontal component () of the internal and external geomagnetic field at the location (lat 3.5^°N, long 96^°E) west of Sumatra (one of the Indonesia^'s islands ).We examine the relationship between the () with altitude at a certain latitude, and relationship between (F,H) with the latitude at the certain altitude .We study also the nature of the secular variation of the geomagnetic field at the same location during the epoch (1965-2010) .