Interrelationship Between Tectonic Stress Patterns and Fault Movements in Iran

Category Tectonic & Seismotectonic
Group GSI.IR
Location 21th symposium on geosciences
Holding Date 24 May 2008

      Iran is probably one of the most earthquake prone countries in the world. As a consequence of the complex structural patterns and young tectonics, which are characteristics of the Alpine orogenic system, destructive earthquakes are of frequent occurrence in this country. The study of quantitative seismotectonic parameters in a seismogenic area play an important role in the analysis of tectonic characteristics and earthquake potential in that area. Interrelationship between the tectonic stress field and crustal movement potential of any given area can be drawn by examining the principal stress orientations and the fault geometrical characteristics in that area, based on the Navier- Coulomb shear failure criterion. In this paper the source parameters of 800 earthquakes combined with information obtained from the fault maps have been analyzed to investigate the interrelationship between the Current Tectonic Regime (CTR) and the movement potential of the major faults in Iran. Finally, maps showing the present tectonic stress directions and the infered Fault Movement Potential (FMP) for the country are drawn. The results should be considered in the studies of earthquake activity, seismic zoning, and hazard estimation of the region.

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