FIELD: seismology.
SUBSTANCE: invention relates to the field of seismology and can be used to determine the precursor of an earthquake. Essence: measuring the refractive indices of the optical indicatrix of the polarization sensor. The dynamics of elastic stresses is traced. When identifying elastic stresses equal to (0.0024-0.0035)E, kg / cm2, where E is the elastic modulus, a conclusion is made about an impending earthquake.
EFFECT: increased accuracy of determining the impending earthquake.
1 cl, 2 ex, 2 tbl
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