Quasi-biennial and quasi-triennial oscillations in geomagnetic activity indices
Data for geomagnetic activity index aa for 1868–1994 were subjected to spectral analysis for 12 intervals each of 11 consecutive years. In each interval, QBO and QTO (quasi-biennial and quasi-triennial oscillations) were observed at ~2.00, 2.15, 2.40, 2.70 y and ~3.20, 3.40 y, but not all in all...
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| Format: | Article |
| Language: | English |
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Copernicus Publications
1997-12-01
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| Series: | Annales Geophysicae |
| Online Access: | https://www.ann-geophys.net/15/1581/1997/angeo-15-1581-1997.pdf |