Fig. 11


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Ionospheric equivalent currents between 59°N and 79°N latitudes and 3°E to 42°E longitudes obtained from the International Monitor for Auroral Geomagnetic Effects (IMAGE) of Space and Earth Observation Centre, Finnish Meteorological Institute ( at 0657 UT on 29 October 2003 (the time of GIC peak of ~57 A). The color scale at the bottom shows the magnitude of the eastward currents. The ionospheric equivalent currents, flowing at ~100 km altitude, are calculated from 41 ground magnetometers (shown by black filled circles) from IMAGE.

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