求助一到地球物理的题

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知道地球磁场的single dipole moment Mx, Mz,My如何求 相交的位置



9 X& G! q$ ]* G" T(2) The Earth’s main magnetic field at the surface (radius = 6371 km) can be approximated by a single dipole moment at the Earth's centre with the following (x,y,z) components:
+ I- c" d- z5 h2 o- F
' W( B  s/ W  J: T& R2 n  wmz = -7.7 x 1022 A m2, mx = -0.479 x 1022 A m2, my = 1.399 x 1022 A m2.

5 X. W1 r- t4 ?4 tCalculate the location (latitude, longitude) where the axis of this dipole field intersects the Earth's surface (i.e. where the magnetic field is locally purely vertical and upward).
5 p9 c) f9 B# W$ w" t1 a( H0 a. F