Investigation of the influence of seismic activity on the translucency coefficient of the sporadic Es layer over Kamchatka

Bogdanov V.V., Pavlov A.V.

    Small-scale turbulence of the sporadic Es layer (tens of meters) is estimated by the translucency coefficient ΔfbEs, and large-scale turbulence (hundreds of meters) is expressed in Es scattering. Before large earthquakes with magnitudes M≥5.0, the formation of abnormal sporadic layers in E region can be observed: an increase in the electron concentration and the translucency coefficient in the interval from 14 to 3 days before an earthquake and a subsequent sharp decrease in the values of these parameters 1 day before the earthquake.

    This paper analyzes the changes in the translucency coefficient of the sporadic Es layer preceding the onset of earthquakes with magnitude M≥5.0 that occurred in Kamchatka region during the period 2015-2019. The prognostic efficiency of the ΔfbEs parameter was evaluated according to the methods of A.A. Gusev and G.M. Molchan.

    Bogdanov V.V., Pavlov A.V. Investigation of the influence of seismic activity on the translucency coefficient of the sporadic Es layer over Kamchatka // Herald of KRAUNTS. Series: Physical and Mathematical Sciences. 2020. Vol. 33, No. 4. p.157-165. DOI: 10.26117/2079-6641-2020-33-4-157-165