Study indicates that the intensity, direction and magnitudeofstress vary in different geologic periods. The stress values show a trend of increase from the old to young formations.
研究表明，不同地质时期应力强度不同，应力的方向和大小都有变化，认为应力值由老到新呈增大趋势。
2
The magnitude and timing of an earthquake depend on the size of the fault being ruptured, the stiffness of the rocks in question and the amount of stress that has accumulated in them.
地震的震级和发生时机，取决于断层破裂的范围，相关的岩石刚度以及其内部积聚的压力。
3
Conclusions: the variation of tooth position could affect the magnitude and direction of the main apical stress, in which the symmetry of the occlusion type was also involved.