TY JOUR TI Crustal Movements and Deformations in Relation to Seismicity in Continuation of the Preparation Period of the Kamchatka Megathrust Earthquake (2020–2025) KW GNSS KW internal displacement deficit KW crustal movements KW crustal deformations KW earthquake forecast KW Kamchatka megathrust earthquake JO Russian Journal of Earth Sciences AU Докукин, П.А. AU Кафтан, В.И. AU Титков, Н.Н. AU Чебров, Д.В. PY 2026 IS 26 PB Геофизический центр Российской Академии Наук