Eight-petaline pattern of maximum shear stress and four-quadrant pattern of the mean stress, centered the weakening segment of fault, may be considered as possible sign of the seismogenic fault.

• 以弱化段为中心,最大剪应力增量场的八瓣式分布和平均应力增量场的四象限分布,可作为识别发震构造的标志。