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Necessity of expensive rock workings (pits, adits) for extensometers to be set up encourages searches for alternativemethods of the Earth’s crust stressed strained state variation monitoring.
As all rocks are somewhat fractured and tensosensitive the physical mechanical properties (elasticity, electrical conductance, heat conductance, permeability, strength etc.) and related geophysical fields are sensitive to the stressed-strained state variations the inner structure of rock massifs is also changed; this processis accompanied by radiation of elastic and electromagnetic waves (acoustic, seismic and electromagnetic emissions). Thus there exist physical prerequisites for studying geodynamic processes by geophysical methods which explains topicality and prospects for geophysical monitoring of modern geodynamic and seismotectonic processes. On the basis of a complex analysis of microseismic, extensometric, geothermic, geoaccoustic observation results the following conclusions may be drawn:
- temporal variations of all geophysical field characteristics studied are characterized by a complex oscillation behaviour;
- distinct connections between geophysical field characterostics registered are absent because of the influence of the factors neglected;
- time intervals of anomalous compression of the Earth’s crust rocks correspond to decrease periods of their temperature;
- rock compression is accompanied by growth of seismic emission (mean monthly values of total earthquake energy with epycentres located within the testing area);
- periods of speeding up seismic processes lag behind periods of rock compression approximately by 1-2 months which opens prospects for predicting the time of local seismicity anomalous increase;
- non-distinct connections between temporal variations of geophysical field characteristics demand specific mathematical analysis and an optimal set of geophysical regime observation techniques for the problem of predicting the time of local seismicity speeding up to be solved.
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