Articles | Volume 11, issue 4
Nat. Hazards Earth Syst. Sci., 11, 1011–1017, 2011

Special issue: Progress in research on earthquake precursors

Nat. Hazards Earth Syst. Sci., 11, 1011–1017, 2011

Research article 01 Apr 2011

Research article | 01 Apr 2011

On the acoustic model of lithosphere-atmosphere-ionosphere coupling before earthquakes

C.-V. Meister1, B. Mayer1, P. Dziendziel1, F. Fülbert1, D. H. H. Hoffmann1, and V. A. Liperovsky2 C.-V. Meister et al.
  • 1Institut für Kernphysik, Technische Universität Darmstadt, Schlossgartenstr. 9, 64289 Darmstadt, Germany
  • 2Institute of Physics of the Earth of the Russian Academy of Sciences, Bolshaya Gruzinskaya 10, 123995 Moscow, Russia

Abstract. In this work, the many-fluid magnetohydrodynamic theory is applied to describe the modification of the electromagnetic field of the ionospheric E-layer by acoustic-type waves. There, altitudinal profiles of the electromagnetic field and the plasma parameters of the atmosphere and ionosphere are taken into account. It is concluded that at E-region altitudes above seismo-active regions, magnetohydrodynamic waves as Alfvén and magnetoacoustic ones might change their amplitude and direction of propagation. Waves of the Farley-Buneman type might also be excited a few days before very strong earthquakes. The collisions between the neutral and charged particles of the E-layer also cause diffusion and heating processes. Thus, changes of the characteristic foE-frequency might be obtained.