TY JOUR TI Response of Geofluid Systems to the Activation of Regional Seismicity in Kamchatka in July 2025 KW Frac-Digger KW fluid pressure KW geomechanics KW magma boiling KW CO2 gas-lift KW regional extension KW geysers KW water level KW drop KW eruptions KW volcanoes KW faults KW Kamchatka megathrust earthquake JO Russian Journal of Earth Sciences AU Solomatin, A.V. AU Kiryukhin, A.V. AU Polyakov, A.Y. AU Lemzikov, M.V. AU Burnaikin, D.N. AU Petrochenko, V.P. AU Kopylova, G.N. AU Ryabinin, G.V. AU Demyanchuk, Y.V. AU Usacheva, O.O. PY 2026 IS 26 PB Geophysical Center of the Russian Academy of Sciences