%0 Journal Article %T On the Use of a Complex Indicator of the Stability of Permutation Entropy of Time Series Fragments When Analyzing Infrasound Monitoring Signals of the Altai Republic %A Kudryavtsev, N.G. %A Frolov, I.N. %A Safonova, V.Y. %K infrasound monitoring, time series, permutation entropy, complexity assessment, stratospheric waveguide, turning points %J Russian Journal of Earth Sciences %D 2023 %N 23 %P 15 %I Geophysical Center of the Russian Academy of Sciences