Geomagnetic activity impact on the results of the induction vector calculations

I. Rokityansky, V. Babak, A. Tereshin


Induction vector has temporal variations caused by changes of geomagnetic activity when the average amplitude of the MT-field is comparable to noise amplitude. Frequency characteristics of these temporal variations are studied for several Japanese observatories. Temporal variations cover a range from units to 1,000 and more seconds on observatories situated close to railways, powered by direct current. In other cases, these variations appear on shorter periods.


electromagnetic response functions; induction vectors; electrical conductivity of the lithosphere; geomagnetic activity; magnetotelluric field


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