Fig. 3


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Reversed Sfe recorded at Ebro Observatory at 11-07-1978. D component is represented by a solid red line, zero line (nocturnal level) by a black dashed line, and the regular variation (interpolated) during the Sfe by a blue dotted line. At the moment of the Sfe (10:56) Sq variation presented negative values (Sq focus was on the West) while Sfe presented positive values (Sfe focus was on the East).

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