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Bulgarian Journal of Physics
Print: 1310-0157 Online: 1314-2666
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RECOGNIZED BY THE EUROPEAN PHYSICAL SOCIETY 
Bulg. J. Phys. vol.27 no.2 (2000), pp. 047-050
An Approach for Measuring the Electric and Magnetic Fields in the System Ionosphere-Atmosphere-Litosphere
B. Boytchev1, P. Nenovski2
1Space Research Institute, 1000 Sofia, Bulgaria
2Geophysical Institute, 1113 Sofia, Bulgaria
go back1Space Research Institute, 1000 Sofia, Bulgaria
2Geophysical Institute, 1113 Sofia, Bulgaria
Abstract. A system for measuring the electrotelluric and geomagnetic fields in the ULF range is suggested. The physics of the ULF disturbances produced by ionospheric currents and their field penetration to the earth are considered and requirements to the measuring system are subsequently pointed out. The earth electric potentials and implications for seeking various seismic precursors are also examined.