The Earth's Electrical Environment (1986) / Chapter Skim
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Pages 224-226
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From page 224... ...
The dawn-to-dusk potential drop across the polar cap varies from about 30 kV for quiet geomagnetic activity, to about 60 kV for average geomagnetic activity, and to about 150-200 kV during geomagnetic storms. In addition, for greater geomagnetic activity the convection pattern expands equatorward by about 5° from its normal quiet-time position.
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From page 226... ...
RAYMOND G ROBLE and ISRAEL TZUR air-earth current and ground electric field at high latitudes during quiet geomagnetic periods and larger variations during geomagnetic storms and substorms.
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