Geomagnetic activity impacts on the results of the induction vector calculations
© © I.I. Rokityansky, V.I. Babak, A.V. Tereshyn, 2015
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.
Key words: electromagnetic response functions, induction vector, electrical conductivity of the lithosphere, geomagnetic activity, magnetotelluric field.