%0 Journal Article %T Anomalous Changes in Ionospheric Parameters During the Preparation and Occurrence of the M8.8 Earthquake and a Series of Earthquakes With M ≥ 6 That Occurred Near the Kamchatka Peninsula From June to September 2025 According to the Data of Satellite Navigation Systems %A Bondur, V.G. %A Tsidilina, M.N. %A Voronova, O.S. %A Gaponova, M.V. %A Timoshina, G.A. %K Remote sensing, ionospheric electron density, total electron content, seismo-ionospheric coupling, ionospheric anomalies, Kamchatka megathrust earthquake %J Russian Journal of Earth Sciences %D 2026 %N 26 %P 0 %I Geophysical Center of the Russian Academy of Sciences