TY JOUR TI Assessing Pre-Seismic Deformation in Southern Kamchatka: A Joint SBAS-InSAR and GNSS Analysis Prior to the July 29, 2025 Earthquake KW Geodynamics KW interseismic deformation KW lithospheric block structure KW radar interferometry KW deformation mapping KW July 29 KW 2025 earthquake KW subduction zone KW kamchatka megathrust earthquake JO Russian Journal of Earth Sciences AU Bondur, V.G. AU Chimitdorzhiev, T.N. AU Dmitriev, A.V. AU Kirbizhekova, I.I. AU Titkov, N.N. PY 2026 IS 26 PB Geophysical Center of the Russian Academy of Sciences