Lithosphere-atmosphere-ionosphere coupling as governing mechanism for preseismic short-term events in atmosphere and ionosphere

O. Molchanov (1) , E. Fedorov (1) , A. Schekotov (1) , E. Gordeev (2) , V. Chebrov (3) , V. Surkov (1) , A. Rozhnoi (1) , S. Andreevsky (1) , D. Iudin (4) , S. Yunga (3) , A. Lutikov (3) , M. Hayakawa (5) , P. F. Biagi (6)

1 Inst. of the Physics of the Earth
2 Institute of Volcanology and Seismology of the RAS
3 Geophysical Survey
4 NIRFI - Radiophysical Research Institute
5 UEC - University of Electro-Communications [Tokyo]
6 UNIBA - Università degli studi di Bari Aldo Moro = University of Bari Aldo Moro

We present a general concept of mechanisms of preseismic phenomena in the atmosphere and ionosphere. After short review of observational results we conclude: 1. Upward migration of fluid substrate matter (bubble) can lead to ousting of the hot water/gas near the ground surface and cause an earthquake (EQ) itself in the strength-weakened area; 2. Thus, time and place of the bubble appearance could be random values, but EQ, geochemistry anomaly and foreshocks (seismic, SA and ULF electromagnetic ones) are casually connected; 3. Atmospheric perturbation of temperature and density could follow preseismic hot water/gas release resulting in generation of atmospheric gravity waves (AGW) with periods in a range of 6?60min; 4. Seismo-induced AGW could lead to modification of the ionospheric turbulence and to the change of over-horizon radio-wave propagation in the atmosphere, perturbation of LF waves in the lower ionosphere and ULF emission depression at the ground.

Domaines: Interfaces continentales, environnement; Océan, Atmosphère; Sciences de la Terre

O. Molchanov, E. Fedorov, A. Schekotov, E. Gordeev, V. Chebrov, et al.. Lithosphere-atmosphere-ionosphere coupling as governing mechanism for preseismic short-term events in atmosphere and ionosphere. Natural Hazards and Earth System Sciences, 2004, 4 (5/6), pp.757-767. ⟨hal-00299224⟩