Dynamics of ionospheric parameters before earthquakes on 28.02.2013-01.03.2013 and 19.05.2013-24.05.2013

In the present report the variations of ionospheric parameters and ionospheric turbulence before and during seismic events are studied applying complex radiophysical methods and using a theoretical probability approach, suggested by the authors. The probability approach allowed to detect the growth of seismic activity in the Kamchatka region in 2013. It is found that characteristic ionospheric features as K-layer formation (corpuscular layer due to precipitation of particles from the radiation belts), increase of the characteristic f0F2-frequency and formation of F- spread as well as Es-spread occured about one day before some seismic events on February-March (28.02.-02.03) 2013 and some days before series of the events on 19-24 May 2013.