Figure 2

The correlation between magnetospheric and geomagnetic field fluctuation power. (a) The cross-correlation, averaged over 2006 to 2010, between the Pc5 power in the magnetosphere and at TNB (black) and AQU (red), together the 95% confidence levels (dashed, gray lines). (b) The dynamic correlation between simultaneous magnetospheric and ground geomagnetic fluctuation power at TNB (black) and AQU (red), and the SW speed (cyan). (c) A detail of 2007.