IJG  Vol.6 No.7 , July 2015
On the Diurnal Dependence of fbEs-Variations Due to Earthquakes
Abstract: In the present work, disturbances of the half-transparency frequency fbEs of the ionospheric sporadic E-layer are investigated in connection with earthquakes. The fbEs-frequency is proportional to the square root of the maximum ionisation density of the sporadic E-layer. In this work, it is shown that in 2/3 of the cases, two days before a seismic shock with magnitude M > 5.5 and on the day of the shock, an increase of the fbEs-frequency is obtained at sunset hours at distances from the epicenter R < exp (M) km. In contrast, before sunrise, the fbEs-value decreases. The data analysed are obtained by the three vertical ionospheric sounding stations“Kokubunji”, “Yamagawa”, and “Wakkanai” during some tens of years.
Cite this paper: Liperovskaya, E. , Meister, C. , Hoffmann, D. , Silina, A. , Vasil’eva, N. (2015) On the Diurnal Dependence of fbEs-Variations Due to Earthquakes. International Journal of Geosciences, 6, 656-665. doi: 10.4236/ijg.2015.67053.

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