Examination of the basic assumption of stress tensor inversion methods

应力张量反演方法被广泛用于从断层滑动方向估计地壳应力状态。该方法基于断层滑动方向与区域应力状态一致的假设。本研究通过数值实验验证了这一假设。结果发现，滑动方向的显着分散，这也支持了天然断层滑动数据。反演方法的设计应考虑到色散。

Stress tensor inversion methods are widely used to estimate the earth's crustal stress state from fault-slip orientations. The methods are based on an assumption that the slip directions of faults are consistent with the regional stress state. This study examined the assumption through numerical experiments. As a result, a significant dispersion of slip directions was found, which is also supported by natural fault-slip data. The inversion methods should be designed so as to take the dispersion into account.