In this study, presented an improved picture of the ongoing crustal deformation field for the Zagros as an evolving foreland fold and thrust belt by using an extensive combination of geodetic, seismic and geologic analysis. The significant amount of oblique Arabia–Eurasia convergence currently being absorbed within the Zagros. Some of the total available energy is spent in seismic deformations, and amount of them stored in faults, the remaining consumed the creep and aseismic processes. Estimate of moment rate is comparatively reckoned as a new method for dealing with tectonic activities rate in different regions. There are now three major types of data available to estimate these occurrence rates: Geodetic moment rate (based on GPS data), seismic moment rate (on the basis of historical and instrumental earthquake data) and geologic moment rate (based on known faults geometry) are estimated for Zagros block in S-SW of Iran that each approach has limitations. In All of the Zagros belt, the most of moment rate was estimated respectively in Geodetic moment rate Almost equal 7.4407 × 1019 Nm/yr, Seismic moment rate Almost equal 3.4385 × 1018 Nm/yr and then geologic moment rate almost 6.1 × 1015 Nm/yr .
In this study, different parts of the Zagros mountain range are divided into three methods (structural, tectonosedimentary and 1°×1° gride), then the results are compared and analyzed. The most of seismic moment rate was obtained respectively in simply-folded belt 1.56 × 1018 Nm/yr, 1.45 × 1018 Nm/yr for high Zagros and 6.24 × 1016 Nm/yr for Khuzestan plain. In other divisions in Izeh, Centeral Lorestan, interior Fars and Bandar Abbas Hinterland subzones, the maximum amount of energy has been released during earthquakes. The value of the seismic/geodetic strain rate ratio (0.0429) near 0 indicates that the aseismic processes dominate the deformation, or stress accumulation is underway which can increase the level of the seismic hazard. Such aseismic deformation is probabl