From the comparison of the worldwide geomagnetic data with IMP 1 magnetic records obtained in the interplanetary space, it is found that the DP 2 fluctuations, which are thought to be the geomagnetic counterpart of intensity fluctuations of the magnetospheric onvective system, are coherent with variations in the north-south component of the interplanetary magnetic field. This coherence is obser...

A large jet encircling the inner core and carrying a significant part of the core angular momentum and axial vortices of ∼ 700 km diameter mainly clustering around the cylinder tangent to the solid inner core, are inferred from geomagnetic secular variation. These results are presented in the form of maps of axial vorticity in an equatorial section. The study takes advantage of the high precisi...

The Earth's magnetic field and celestial cues provide animals with compass information during migration. Inherited magnetic compass courses are selected based on the angle of inclination, making it difficult to orient in the near vertical fields found at high geomagnetic latitudes. Orientation cage experiments were performed at different sites in high Arctic Canada with adult and young white-cr...

The paper describes the characteristics of the equatorial electrojet at Huancayo (HUA, 12.1 o S, 75.3 o W, inclination 1.5 o N, declination 1.0 o E) in western side of South America, where the geomagnetic field is aligned almost along the geographic meridian, and at Itinga (ITI, 4.3 o S, 47.0 o W, inclination 1.4 o N, declination 19.3 o W) in eastern part of South America, where the geomagnetic...