Problems of Engineering Seismology: article

Аnnotation: The diurnal periodicity of earthquakes in four districts of the Dushanbe-Vakhsh region, Tajikistan is analyzed. Three types of earthquake samples with different energy in comparison to the catalog completeness are compiled. The first two types consist of the earthquakes with energy strictly more and strictly less than the catalog completeness, respectively. The earthquakes of intermediate energy are included in the third type samples. The peculiarities of the diurnal periodicities of seismic events in working and non-working days are considered independently of each other. The results reliably demonstrate technogenic origin of the diurnal periodicity of earthquakes with intermediate energy in working days and give reasonable grounds for supposing the similar effects in the samples of weak and strong earthquakes. A large amount of blasts appears to be included in the catalog. The amount of blasts in the earthquake samples of different energy and epoch of observations has been estimated.