Fig. 5.From: Deriving the geomagnetically induced electric field at the Earth’s surface from the time derivative of the vertical magnetic fieldThe measured x-component (North, upper panel) and y-component (East, lower panel) of the surface electric field at Jokkmokk (66.877° North, 19.014° East) during the morning hours of 26.6.1998 and the result calculated using vertical magnetic field from the other BEAR stations.Back to article page