The Cosmic Ray Equator and the Geomagnetism
1960 年 12 巻 1 号 p. 13-20
詳細
1960 年 12 巻 1 号 p. 13-20
It was temporarily thought that the disagreement of the position of geomagnetic dipole equator with that of the cosmic ray equator would be caused by 45° westward shifting of the latter. At first, we examine, referring to the theory of geomagnetic effect on cosmic rays, whether such westward shifting can be existent or not. It is shown, in view of this examination, that the deviation of the cosmic ray equator from the geomagnetic dipole equator is negligible even if the magnetic cavity is present around the earth's outer atmosphere. Taking into account such results, we investigate the origin of the cosmic ray equator and show that this equator can be produced by the higher harmonic components combined with the dipole component of geomagnetism. We then consider the relation of the origin of the cosmic ray equator to the eccentric dipoles, near the outer part of the earth's core, contributing to the secular variation of geomagnetism.
