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Annales Geophysicae An interactive open-access journal of the European Geosciences Union
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Volume 28, issue 3
Ann. Geophys., 28, 779–787, 2010
https://doi.org/10.5194/angeo-28-779-2010
© Author(s) 2010. This work is distributed under
the Creative Commons Attribution 3.0 License.
Ann. Geophys., 28, 779–787, 2010
https://doi.org/10.5194/angeo-28-779-2010
© Author(s) 2010. This work is distributed under
the Creative Commons Attribution 3.0 License.

  16 Mar 2010

16 Mar 2010

Decrease of the electric field penetration into the ionosphere due to low conductivity at the near ground atmospheric layer

M. Ampferer1, V. V. Denisenko2,3, W. Hausleitner4, S. Krauss4, G. Stangl4,5, M. Y. Boudjada4, and H. K. Biernat1,4,6 M. Ampferer et al.
  • 1Institute of Physics, Department of Geophysics, Astrophysics and Meteorology, Karl-Franzens-University Graz, Austria
  • 2Institute of Computational Modelling, Russian Academy of Sciences, Siberian Branch, Krasnoyarsk, Russia
  • 3Siberian Federal University, Krasnoyarsk, Russia
  • 4Space Research Institute, Austrian Academy of Sciences, Graz, Austria
  • 5Federal Office of Metrology and Surveying, Vienna, Austria
  • 6Institute of Physics, Department of Theoretical Physics, Karl-Franzens-University Graz, Austria

Abstract. It is well known that lithospheric electromagnetic emissions are generated before earthquakes occurrence. In our study, we consider the physical penetration mechanism of the electric field from the Earth's surface, through the atmosphere-ionosphere layers, and until its detection in space by satellites. A simplified approach is investigated using the electric conductivity equation, i.e., ∇ˆσ·∇Φ)=0 in the case of a vertical inclination of the geomagnetic field lines. Particular interest is given to the conductivity profile near the ground and the electric field distribution at the Earth's surface. Our results are discussed and compared to the models of Pulinets et al. (2003) and Denisenko et al. (2008). It is shown that the near ground atmospheric layer with low conductivity decreases the electric field penetration into the ionosphere. The model calculations have demonstrated that the electric field of lithospheric origin is too weak to be observed at satellite altitudes.

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