Numerical modeling of block structure dynamics: Application to the Vrancea region and study of earthquakes sequences in the synthetic catalogs

摘要

A seismically active region is represented as a system of absolutely rigid blocks divided by infinitely thin plane faults. By numerical experiments the values of the model parameters were obtained which supplied the synthetic earthquake catalog with the space distribution of epicenters close to the real distribution of the earthquake epicenters in the Vrancea region. The frequency-magnitude relations (Gutenberg-Richter curves) obtained for the synthetic and real catalogs have some common features. The sequences of earthquakes arising in the model are studied for some artificial structures. It is found that 'foreshocks', 'main shocks', and 'aftershocks' could be detected among earthquakes forming the sequences. The features of aftershocks, foreshocks, and catalogs of main shocks are analyzed. (author). 5 refs, 12 figs, 16 tabs. (Atomindex citation 26:076361)