DOI: https://doi.org/10.24028/gzh.0203-3100.v37i6.2015.111173

Geomagnetic activity impact on the results of the induction vector calculations

I. Rokityansky, V. Babak, A. Tereshin

Abstract


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.


Keywords


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

References


Babak V. I., Klimkovich T. A., Rokityanskiy I. I., Tereshyn A. V., 2013. Variations of induction vector in Japan. Geofizicheskiy zhurnal 35(1), 153—158 (in Russian).

Vanyan L. L., 1997. Electromagnetic soundings. Moscow: Nauchnyy Mir, 219 p. (in Russian).

Guglielmi A. V., 2007. Ultra-low-frequency electromagnetic waves in the Earth's crust and magnetosphere. Uspekhi fizicheskih nauk, 177(12), 1257—1276 (in Russian).

Guglielmi A. V., 2015. Foreshocks and aftershocks of strong earthquakes in the light of catastrophe theory. Uspekhi fizicheskih nauk, 185(4), 415—429 (in Russian).

Rokityanskiy I. I., Babak V. I., Tereshyn A. V., 2015. Variations of geomagnetic response functions in Japan. Geofizicheskiy zhurnal 37(4), 126—138 (in Russian).

Rokityanskiy I. I., Tregubenko V. I., Babak V. I., Tereshyn A. V., 2013. Variations of induction vector components and horizontal tensor before the Tohoku earthquake of March 11, 2011 according to Japanese geomagnetic observatories data. Geofizicheskiy zhurnal 35(3), 115—130 (in Russian).

Shuman V. N., 2015. On conceptual grounds of diagnostics and monitoring of geosystems. Geofizicheskiy zhurnal 37(4), 93—103 (in Russian).

Shuman V. N., 2007. Electromagnetic signals of lithospheric origin in modern surface and remote sounding systems. Geofizicheskiy zhurnal 29(2), 3—16 (in Russian).

Earthquake prediction is possible?!, 2014. Ed. S. A. Pulinets. Moscow: Trovant, 144 p. (in Russian).

Surkov V., Hayakawa M., 2014. Ultra and extremely low frequency electromagnetic fields. Japan: Springer, 486 p.