TY JOUR TI Seismic Monitoring in Severo-Kurilsk Before and After the July 29 (30), 2025 Earthquake Based on Data from an Engineering Seismometric Station KW Engineering seismometric station KW seismic process KW accelerometer KW instrumental intensity KW Kamchatka megathrust earthquake JO Russian Journal of Earth Sciences AU Kostyleva, N.V. AU Kostylev, D.V. PY 2026 IS 26 PB Geophysical Center of the Russian Academy of Sciences