HR: 14:25h
AN: T43E-04 INVITED     [Abstracts]
TI: Theory and Validation of Lithosphere-Atmosphere-Ionosphere Coupling Processes During the Major Earthquakes
AU: * Pulinets, S A
EM: pulse@geofisica.unam.mx
AB: The recent version of the Lithosphere-Atmosphere-Ionosphere (LAI) coupling model uses the air ionization by radon as a primary source of variations of atmosphere and ionosphere parameters observed experimentally before earthquakes. Effects of ionization have two branches: electromagnetic and thermodynamic. The first one works through generation of anomalous electric field in the near ground layer of atmosphere, its penetration into the ionosphere and formation of irregularities of the electron concentration due to ion drift in anomalous electric and geomagnetic fields. The second branch - it is the observed changes of the air temperature and relative humidity through the process of water vapor condensation on the newly formed ions and the evaporation latent heat release. This process can also lead to the ionosphere modification through the generation of the large scale thermal wave, its transformation into gravity wave moving up into the ionosphere. All stages of the described LAI model can be checked experimentally. The first parameter in the chain is the radon variations. Then the process of formation of the large ion clusters of the aerosol size can be controlled by the photometer air transparency measurements. Changes of atmosphere electricity are controlled by the ground atmospheric electric field measurements. The sources of thermodynamics parameters are the meteorological observations (ground based measurements of air temperature and relative humidity) and satellite remote sensing (surface temperature and latent heat flux measurements). And finally the ionosphere variations are monitored by ground based ionosondes, permanent GPS receivers, and satellite measurements of the space plasma parameters such as electron concentration, electron and ion temperature, ion composition, ion drift, etc. Recent experimental ground and satellite measurements for the major earthquakes will be presented demonstrating the model validity and main stages of the short-term precursors generation and transformation. Complex analysis of the experimental data permitted to reveal the main phenomenological features of the observed variations and to discover the threshold of ionospheric sensitivity to the earthquake preparation (M~5) and magnitude dependence of the spatial extension of the thermal and ionospheric anomalies which are the same order of magnitude as geochemical precursors and comply with Dobrovolsky dependence log(R) = 0.43M where R- is the radius of the area occupied by the anomaly, M = earthquake magnitude.
DE: 0550 Model verification and validation
DE: 3304 Atmospheric electricity
DE: 3367 Theoretical modeling
DE: 6929 Ionospheric physics (1240, 2400)
DE: 7223 Earthquake interaction, forecasting, and prediction (1217, 1242)
SC: Tectonophysics [T]
MN: Fall Meeting 2005