On a Correlation between the Ionospheric Electric Field and the Time Derivative of the Magnetic Field

Figure 2

The black-line plot is the y-component of the electric field in the Earth's frame of rest delayed by the transit time of the solar wind to the front of the magnetosphere divided by ten for a 33 h period on November 2004. The red-line plot is the zonal component of the electric field in the equatorial ionosphere. (After [8]. Reproduced with permission of the European Geoscience Union).