Abstract
This paper may be considered as an additional approval of the way the tectonic activity affects the lower Ionosphere. The results of our investigation, on the occasion of the recent East Aegean tectonic activity, indicate that the High - Frequency limit, fo, of the ionospheric turbulence content, increases as the site and the time of the earthquake occurrence is approaching, pointing to the earthquake location.We conclude that the Lithosphere Atmosphere Ionosphere Coupling (LAIC) mechanism through acoustic or gravity wave could explain this phenomenology, as a result of a the frequency differential damping of the propagating turbulent in the ionosphere. Proper use of this result may lead to a method of earthquake hazard mitigation using the byproducts of the Global Positioning Network (actually Total Electron Contain, TEC, estimations) which are available freely.
Highlights
It is argued that tectonic activity during the earthquake preparation period produces anomalies at the ground level which propagate upwards in the troposphere as Acoustic or Standing gravity waves [Hayakawa et al, 2011; Hayakawa, 2011; Hayakawa et al, 2018]
The inherent frequencies of the acoustic or gravity wave, range between 0.003Hz and 0.0002Hz, which, according to Molchanov et al [2004, 2005], correspond to the frequencies of the turbulent produced by tectonic activity during the earthquake preparation period
Observing the frequency content of the ionospheric turbulence we will observe a decrease of the higher limit of the turbulence frequency band
Summary
It is argued that tectonic activity during the earthquake preparation period produces anomalies at the ground level which propagate upwards in the troposphere as Acoustic or Standing gravity waves [Hayakawa et al, 2011; Hayakawa, 2011; Hayakawa et al, 2018]. In order to select the proper TEC estimations provider we have in mind that: GLONASS and GPS systems provide TEC values through Global Ionospheric Maps each 15 minutes, that is potential observation of TEC variations with frequencies
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