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研究弱震活动性参数的时间进程和空间分布,这些参数是K=10与K=9地震数量之比(N10/N9)、震源深度以及震源机制确定的压应力轴方位角的变化。绘制出弱震活动性参数的空间分布图,识别可预报强震的弱震活动性参数的中期异常。得出强震前1~2年期间的强震孕育区位置。
The time-history and spatial distribution of the activity parameters of the weak earth are studied. These parameters are the ratio of the number of earthquakes K = 10 and K = 9 (N10 / N9), the focal depth and the azimuth of the compressive stress axis determined by focal mechanism. The spatial distribution of weak earthquakes is plotted to identify the medium-term anomaly of weak earthquakes with predictable strong earthquakes. The position of strong earthquake inoculation area during the 1 ~ 2 years before strong earthquakes is obtained.