求助一到地球物理的题

cookgao1992610

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



9 w8 |. [0 l+ W6 [! T6 _/ ?4 r) Y. G% b(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:
3 [. V1 m4 S3 J$ T1 c8 ?- T
; c  \: E9 v  ^4 x0 g/ Cmz = -7.7 x 1022 A m2, mx = -0.479 x 1022 A m2, my = 1.399 x 1022 A m2.

Calculate 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).
4 b# O' M# a7 p' }8 i% e# m% x