UT and day-to-day variations in equivalent current systems for world geomagnetic variations
Abstract
In this present paper, equivalent current systems of the daily geomagnetic variations recorded at two-hour intervals throughout December 1964 are used to study universal-time (UT) and day-to-day variations in low and mid-latitude regions. The coexistence of two types of UT variations in the regular and occasional current systems is established. It is also found that the UT variations in the intensities of the northern and southern current vortices are, with few exceptions, in the opposite sense for both the external and internal current systems. The results obtained are discussed in relation to the origin of regular and occasional variations in the equivalent current systems.
- Publication:
-
Journal of Geomagnetism and Geoelectricity
- Pub Date:
- 1979
- Bibcode:
- 1979JGG....31R..21S
- Keywords:
-
- Diurnal Variations;
- Geomagnetism;
- Ionospheric Currents;
- Magnetic Variations;
- Universal Time;
- Dynamo Theory;
- Geomagnetic Latitude;
- Ground Stations;
- Harmonic Analysis;
- Solar Activity Effects