On the semiannual and annual variations of geomagnetic activity and components
The semiannual and annual lines in a long series of magnetic observatories daily values, as well as in the <i>aa</i>-activity index series, are investigated. For both periods, amplitudes and phases of the lines corresponding to the different series present grossly common variations o...
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Copernicus Publications
2004-11-01
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| Series: | Annales Geophysicae |
| Online Access: | https://www.ann-geophys.net/22/3583/2004/angeo-22-3583-2004.pdf |