TY JOUR TI Analysis of Ionospheric Parameter Dynamics During a Strong Earthquake in Kamchatka on July 29, 2025, Based on a Complex Approach (According to the Data of Ionosphere Vertical Radio Sounding and GNSS) KW Seismic activity KW seismo-ionospheric coupling KW total electron content KW ionospheric disturbances KW wavelet transform KW Kamchatka megathrust earthquake JO Russian Journal of Earth Sciences AU Pavlov, A.V. AU Mandrikova, O.V. AU Titkov, N.N. PY 2026 IS 26 PB Geophysical Center of the Russian Academy of Sciences