Estimates of temperature in the Earth's interior are usually obtained on the basis of thermograms from boreholes or data on the thermal flux. However, both approaches have restrictions. For example, in the first case, it is necessary to perform spatial interpolation of thermograms commonly measured in some nonuni-formly distributed boreholes, which frequently leads to significant errors. In the second case, the construction of a temperature model is based on the assumption about stationarity of thermal fluxes at lateral boundaries of the model zone and a priori knowledge of the thermal flux (temperature) at its upper and lower boundaries. Since its values (especially at the lower boundary) are usually specified very approximately, the construction of models of temperature distribution on this basis can also lead to significant errors.
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