question_answer 49)

  Consider the plane S formed by the dipole axis and the axis of earth. Let P be point on the magnetic equator and in S. Let Q be the point of intersection of the geographical and magnetic equators. Obtain the declination and dip angles at P and Q.

Answer:

                  Refer Fig. 3(EP).22 ;                                                    (i) The point P is on the magnetic equator and in S, so at P, declination = 0 and angle of dip = 0. (ii) The point Q is at the intersection of geographical equator (GE) and magnetic equator (ME), so dip = 0 and declination = .