%0 Journal Article %A K. K. Zapol'skii %T Frequency-time interpretation of $m_{PV}$ magnitude as exemplified by Moneronian earthquake of September 7, 1971 %J Doklady Akademii Nauk %D 1974 %P 796-799 %V 214 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1974_214_4_a16/ %G ru %F DAN_1974_214_4_a16