Evolution of geomagnetic <i>aa</i> index near sunspot minimum
The smoothed values of the minima of sunspot number <i>Rz</i> and the geomagnetic index <i>aa</i> were compared for sunspot cycles 12–23. In one cycle, <i>aa</i>(min) occurred earlier than <i>Rz</i>(min), but remained at that low from a few month...
| Main Author: | |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Copernicus Publications
2002-10-01
|
| Series: | Annales Geophysicae |
| Online Access: | https://www.ann-geophys.net/20/1519/2002/angeo-20-1519-2002.pdf |