1999年至2001年云南几次中强震前应力场方向动态变化及其预测意义

The Dynamic Variation of the Stress Field before Several Mid-strong Earthquakes from 1999 to 2001 in Yunnan and Its Prediction Significance

利用小震综合节面解资料,分析研究了云南近期6次中强震前多分区、多时段应力场方向动态变化,并以多个震例表明,强震前应力场方向存在时空变化,对强震危险性预测具有指示意义。

Using the data of synthetic nodal plane solution of small earthquakes, we have analyzed and studied the dynamic variations of the stress orientations of multi sections and multi time segments before 6 mid-strong earthquakes occurred recently. It shows once again from the earthquake cases that there exist temporal and spatial variations to the orientations of the stress field before strong earthquake, which has directive significance to the forecast of strong earthquakes.