On the earthquake effects in the regime of ionospheric Alfvén resonances

The impact of earthquakes on the regime of ultra-low-frequency electromagnetic emissions

“…Ïðîèñõîaeäåíèå òàêèõ ÓÍ×-èìïóëüñîâ è èõ âîçìîaeíàÿ ôèçè÷åñêàÿ ïðèðîäà óaeå îáñóaeäàëèñü â ðàáîòå îäíîãî èç àâòîðîâ [Äîâáíÿ è äð., 2006], â ñòàòüå [Äîâáíÿ, 2011] ïðèâîäèëèñü ïðèìåðû âîçäåéñòâèÿ èìïóëüñîâ íà êîëåáàíèÿ Ðñ1 è íåêîòîðûå äðóãèå òèïû ãåîìàãíèòíûõ ïóëüñàöèé.  ïóáëèêàöèè [Guglielmi et al, 2006] íèÿ. Ðèñ.…”

On the modulation of intensity of Alfvén resonances before earthquakes: Observations and model

“…We assume that under preparation of strong earthquakes the acoustic-gravity waves (AGW) and internal gravity waves (IGW) of ULF frequency range (0.0005-0.02 Hz) can be excited, which propagate from the Earth's surface upwards and penetrate into E and F-layers of the ionosphere (Guglielmi et al, 2006). At the Earth's surface, the magnitude of AGW and IGW are small.…”

“…Namely, both fundamental mechanisms of the lithosphere-atmosphere-ionosphere coupling, i.e. coupling through the changes in the atmospheric electricity produced as result of integrated ionization from the increased radon emanation (Pulinets and Boyarchuk, 2004) and the conversion of atmospheric acoustic-gravity waves (AGW) and internal gravity waves (IGW) in the lower ionosphere (Hayakawa and Molchanov, 2002;Molchanov, 2004) can lead to the modulation of the ionosphere parameters, creating transparency of the ionosphere for a passage of the Alfvé n waves, which go from the magnetosphere down to the Earth's surface (Guglielmi and Pokhotelov, 1996;Guglielmi et al, 2006). We mention that IGW may reach the altitudes of 300-500 km, whereas AGW at frequencies 0.005-0.02 Hz may reach the altitudes of 200-300 km (Hayakawa, 1999;Koshevaya et al, 2005).…”

Use of the International Reference Ionosphere 2012 model to calculate emission frequency scale of the ionospheric Alfvén resonator

“…Daily, seasonal, and cyclic variations in the properties of the IAR (Belyaev et al 1997;Yahnin et al 2003) were examined. Their relation to various geomagnetic and geophysical processes (Guglielmi et al 2006;Potapov et al 2008;Dovbnya et al 2010Dovbnya et al , 2012 and to the state of the ionosphere (Yahnin et al 2003;Hebden et al 2005;Parent et al 2010;Potapov et al 2014) was studied. A number of authors made suggestions on using the observations of the electromagnetic emission spectral structure within the 0.5-10 Hz range for sounding the ionospheric parameters and specifying ionospheric models (Demekhov et al 2000;Yahnin et al 2003;Parent et al 2010).…”