Abstract
The ionospheric disturbances detected during large-scale earthquakes occurred of early 2010 in South America on the base the analysis of data GPS-observations are considered. The complex analysis of the ground-based stations data integrated into the international IGS and UNAVCO networks was carried out the selected region. Extensive spatial-time measurements statistics of more than 10 million phase data were processed. Stable estimates of distributions are obtained for ionospheric plasma perturbation parameters. The relative contribution of acoustic-gravity waves to the ionospheric disturbances formation during the large earthquakes preparation is investigated.
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