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

• Published in: Natural hazards and earth system sciences Vol. 4; no. 5/6; pp. 757 - 767
• Main Authors: Molchanov, O., Fedorov, E., Schekotov, A., Gordeev, E., Chebrov, V., Surkov, V., Rozhnoi, A., Andreevsky, S., Iudin, D., Yunga, S., Lutikov, A., Hayakawa, M., Biagi, P. F.
• Format: Journal Article
• Language: English
• Published: Copernicus Publ. / European Geosciences Union 01-01-2004; Copernicus Publications
• Subjects: Continental interfaces, environment; Earth Sciences; Ocean, Atmosphere; Sciences of the Universe
• ISSN: 1684-9981; 1561-8633; 1684-9981
• DOI: 10.5194/nhess-4-757-2004

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.