The relation between characteristics of a single lithospheric source of acoustic-gravity waves and ionospheric response

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Space and Atmospheric Physics
1Gotynyan, OE, 2Ivchenko, VM, 3Rapoport, Yu.G
1Taras Shevchenko National University of Kyiv, Kyiv, Ukraine
2Taras Shevchenko National University of Kyiv, Physical Faculty, Kyiv, Ukraine
3Taras Shevchenko National University of Kyiv, Kyiv, Ukraine, Space Research Institute of the National Academy of Sciences of Ukraine and the State Space Agency of Ukraine, Kyiv, Ukraine
Kosm. nauka tehnol. 2003, 9 ;(5-6):124-129
https://doi.org/10.15407/knit2003.05.124
Publication Language: Ukrainian
Abstract: 
A three-dimensional numerical model of the acoustic-gravity wave (AGW) excitation from near ground lithospheric thermal source is developed. An ionospheric plasma linear response in F region of the ionosphere is obtained. A relationship between ionospheric response and AGW period is derived. A relationship between ionospheric response and geomagnetic field direction is investigated. The amplitude of relative electron concentration change in ionospheric plasma corresponds to AGW with typical periods of the order of 1 h. Such periods and absolute value of relative change of electron concentration in the ionospheric F layer coincide by the order of value with reported data of observations before earthquakes. The typical model value of relative electron concentration disturbances in the used model of ideal atmosphere is equal to several tens of percents at the F region altitudes.
Keywords: acoustic-gravity waves, ionospheric response, lithospheric source
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