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Variations of geomagnetic components X, Y, and Z recorded in 19 Intermagnet European observatories in 2004 were analysed. The original data from all observatories were preliminarily processed. In the first step, periods longer than three hours were filtered out. In the second step, variations of vertical geomagnetic component Z were separated into external and internal parts. We introduced a non-dimensional...
This publication is a contribution to discussion on the geometry and petrography of the rock complex responsible for the Carpathian conductivity anomaly. We analysed arguments showing that this anomaly is caused by induction in the sedimentary basin, and make a critical review of various data to find out whether the good conductivity is connected with a rock complex containing graphite or mineralized...
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