For citations:
Kopylova G.N., Boldina S.V. Hydrogeological precursors of earthquakes and volcanic activations according to observation data in Kamchatka Peninsula wells. Earth sciences and subsoil use. 2021;44(2):141-150. (In Russ.) https://doi.org/10.21285/2686-9993-2021-44-2-141-150