%0 Journal Article %A V. V. Bogdanov %A A. V. Pavlov %T A methodology to estimate a region and waiting period for strong kamchatka earthquakes based on seismic and~ionospheric predictive signs %J Vestnik KRAUNC. Fiziko-matematičeskie nauki %D 2020 %P 59-78 %V 30 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/VKAM_2020_30_1_a4/ %G ru %F VKAM_2020_30_1_a4