Stress–Strain State Monitoring of the Geological Medium Based on The Multi-instrumental Measurements in Boreholes: Experience of Research at the Petropavlovsk-Kamchatskii Geodynamic Testing Site (Kamchatka, Russia)

Autor: Yu. A. Vlasov, A. V. Deshcherevskii, V. A. Gavrilov, Ivan Panteleev, Yu. Yu. Buss, A. V. Lander, Yu. V. Morozova
Rok vydání: 2019
Předmět:
Zdroj: Pure and Applied Geophysics. 177:397-419
ISSN: 1420-9136
0033-4553
Popis: We present the results of the long-term study which make it possible to assess the possibilities of two methods used at the Petropavlovsk-Kamchatskii geodynamic site (Russia) for continuous monitoring of the stress–strain state of geoenvironment. The methods are based on the borehole geoacoustic measurements and electromagnetic measurements with underground electric antennas. Combined with hydrogeochemical and hydrogeodynamic borehole measurements, these methods allow monitoring the changes in the parameters of geological environment and identifying the stages in the changes of its stress–strain state. As the examples, we present the results of the measurements in the time vicinities of the strongest seismic events that occurred during the period of joint borehole geoacoustic and electromagnetic measurements at the Petropavlovsk-Kamchatskii geodynamic site. We also analyze the data obtained in the time vicinities of the Tohoku mega-earthquake (March 11, 2011, Japan, Mw 9.1) and a close strong Zhupanovskoe earthquake (January 30, 2016, Mw 7.2) that occurred at the epicentral distances R = 107 km from Petropavlovsk-Kamchatskii. It is shown that the discussed methods are promising for medium- and short-term forecasting of the earthquakes.
Databáze: OpenAIRE
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