FEASIBILITY OF APPLICATION OF SOIL RADON ACTIVITY CONCENTRATION VARIATIONS IN STUDYING GEODYNAMIC PROCESSES
I.A. Kozlova, A.K. Yurkov, S.V. Biryulin
Yu.P. Bulashevich Institute of Geophysics, Ural Branch of the Russian Academy of Sciences, Yekaterinburg, Russia
Keywords: Earthquakes, precursors, forecast, radon, monitoring, Southern Kuril Islands
Abstract
We discuss possibilities of application of radon activity concentration variations in investigating changes in the stress-strain state of a rock massif. Based on the long-term radon monitoring at the South Kuril geodynamic polygon, the methodology for interpretation of soil radon activity concentration anomalies has been developed. A causal relationship between earthquakes and radon anomalies has been established. It is shown that tectonic events occur after the radon anomaly passes over the maximum level, and the reflection time depends on the distance between the observation point and the epicenter of the event. The mechanisms of formation of radon anomalies in the compression/extension zones are described.
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