This paper provides a latest compilation of data on the present-day stress pattern in Central Iran and its tectonic regime. We compiled 103 focal mechanism data collected from the Global Centroid Moment Tensor Project (GCMT) including data from Harvard University (HRVD) and the International Seismological Center (ISC). Stress inversion of all shallow focal depths provides a first order stress field with a N029°E maximum horizontal compressive stress (SH_max) direction corresponding to a general compressive tectonic regime. In order to reconstruct the second and third order stress fields, we subdivided the study area into eight zones on the basis of their structures, relatively similar focal mechanisms and relatively homogeneous deformation. For each zone and for the same data set, reduced stress tensors have been obtained by formal stress inversion using the Win-Tensor program and modified SLICK method. Both inversion methods show similar results for horizontal stress axes orientations and for the tectonic regimes.

The obtained NE-SW direction of the first order stress field is related to Arabia-Eurasia convergence as confirmed by the geodetic measurements. This stress field is responsible for accommodation of shortening within Central Iran and right-lateral movement along the N-S faults as well as left-lateral movement along the E-W faults. Solid block rotation between strike-slip and thrust faults, vertical rotation of the fault bounded blocks, escape tectonics, block extrusion and strain partitioning occurred due to second and third order stress fields with variable SH_max directions from N006° to N081° and in different tectonic regimes.

本文提供了有关伊朗中部及其构造政权目前的压力模式的最新数据汇编。我们收集了103个从全球质心矩张量项目（GCMT）收集的震源机制数据，包括哈佛大学（HRVD）和国际地震中心（ISC）的数据。所有浅焦点深度的应力反演都提供一阶应力场，最大水平压缩应力为N029°E（SH _max）方向，对应于一般的压缩构造区域。为了重建二阶和三阶应力场，我们根据研究区域的结构，相对相似的震源机制和相对均匀的变形将其划分为八个区域。对于每个区域和相同的数据集，已使用Win-Tensor程序和改进的SLICK方法通过形式应力反演获得了减小的应力张量。两种反演方法对于水平应力轴方向和构造形态都显示出相似的结果。

大地测量结果证实，获得的一阶应力场的NE-SW方向与阿拉伯-欧亚大陆的收敛有关。该应力场负责调节伊朗中部的缩短，以及沿着NS断层的右旋运动以及沿着E- W断层的左旋运动。走滑断层和逆冲断层之间的实心块旋转，断层有界块的垂直旋转，逃逸构造，块挤压和应变分配是由于具有从N006°到N081°以及不同的SH_最大方向的二阶和三阶应力场引起的构造体制。