Strain and Moment Rates from GPS and Seismological Data in Northern Iran: Implications for an Evaluation of Stress Trajectories and Probabilistic Fault Rupture Hazard

This study provides a multi-disciplinary overview of the seismology and geodetic data with tectonics analysis in order to provide an evaluation stress trajectories, probabilistic fault rupture hazard assessment. Based on different scenarios obtained from comparison several overviews their interpretation, we investigated kinematics active structural zones. In this study, magnitudes directions seismic strain rates (SSR GSR) were evaluated using reliable earthquake focal mechanisms all available GPS (1999–2015) subzones northern Iran, where have experienced more than 14 strong instrumental earthquakes (Mw ? 6). addition, tectonic model was inferred Focal Mechanism Stress Inversion (FMSI). The new crustal map proposed by weighted average SSR, GSR, FMSI. N35.5° E N104° estimated for Alborz Talesh mountains, respectively. numerical regimes confirms slip partitioning mechanism oblique shortening sub-parallel thrusts strike-slip faults area. Four main regime categories defined, including thrust (49.37%), (39.24%), component (2.53%), normal (1.27%), unknown faulting (7.59%). Seismic moment (SMR GMR) also calculated evaluate function these parameters determining seismicity arrangement. ratio seismic/geodetic area is ~70.7%. Alborz, western Koppeh-Dagh, north part Central South Caspian Basin, ~0.9, 0.3, 11.9, 57.3, respectively, which indicates most elastic energy has been released Iran. that deformation high (networks 8, 9, 17) Koppeh-Dagh 5, 13).