V.A. Gavrilov, Yu. A. Vlasov, V.P. Denisenko, Yu.V. Morozova, Yu.Yu. Yakovleva

Institute of Volcanology and Seismology, Far East Division, Russian Academy of Sciences, Petropavlovsk-Kamchatsky, 683006, Russia

This paper presents results of continuous long-lasting observations made in the area of Petropavlovsk-Kamchatsky using three unique methods of geophysical study: geoacoustic measurements in deep wells with installation of sensors at depth more than 1000 m; monitoring of natural ULF electromagnetic emission by means of underground electrical antenna; monitoring of variations in water density in the well. The conclusions of the study reveal that complex facilities of geophysical monitoring leads to a possibility for reliable identification of premonitory anomalies, detailed study of their nature, and enhanced effectiveness of a short-term prediction of earthquakes.