Table 3 Results of trend tests and regression analyses for the residual Sq amplitude obtained at six geomagnetic stations
From: Long-term variation in the upper atmosphere as seen in the geomagnetic solar quiet daily variation
Station name | Trend test | Slope of linear regression [nT/year] | Standard error of the slope [nT/year] |
|---|---|---|---|
Addis Ababa | Decrease | −0.125 | 0.084 |
Trivandrum | Decrease | −0.197 | 0.145 |
Kakioka | Decrease | −0.061 | 0.025 |
San Juan | No trend | 0.001 | 0.012 |
Chambon-La-Foret | Decrease | −0.216 | 0.035 |
Niemegk | Decrease | −0.120 | 0.037 |