Allan Cox 1970 <p class="chapter-para">Changes in the direction of the Earth's magnetic field at a given site are produced in part by wobble of the main geomagnetic dipole, in part by fluctuations in the intensity and direction of the non-dipole field, and in part by changes in the intensity of the main dipole field. These three processes combine to produce an angular variance that is strongly latitude dependent. A method is presented for isolating the contribution due to variation with latitude of the average intensity of the non-dipole field.</p> application/pdf 10.1111/j.1365-246X.1970.tb06069.x en Oxford University Press Latitude dependence of the angular dispersion of the geomagnetic field article