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The midlatitude fluctuations are rather weakly relative to high latitude ones. The most intensive midlatitude TEC fluctuations are related with irregularities generated during strong geomagnetic storms. It was analyzed TEC fluctuations activity for quiet November 6, 2004 and disturbed days November 8–9. At November 9 the intensity of TEC fluctuations was higher 0.25 TEC/min near 20 UT at midlatitude...
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