Abstract
The seismic regime of tectonic faults was studied by the method of physical modelling. This method is based on the assumption that the physical processes in actual seismo-active fault zones can be scaled in laboratory conditions. The results of our laboratory experiments on plate models proved the great importance of tectonic stress orientation on the seismic regime of tectonic faults. Changes in the fault inclination led to distinct changes both in the recurrence time intervals between individual seismic events and in the amount of seismic energy released. For some fault inclinations the seismic activity of faults vanished altogether. Only a limited zone in the fault plane was found to participate in the process of seismic energy release. The extent of this so-called seismo-active zone depends not only on the contact conditions, but also on the value of the acting load and on the fault inclination; this presumption is supported by the fact that for each inclination there exists an upper limit to the seismic energy that can be released in one seismic event.
Published Version
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