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利用缺震方法对山东南部(鲁南)三个小区的地震分别进行统计处理,观测到发生在西区的三次4.5级(M_L,下同)以上地震在本区均有“缺震”反映,其中1983年11月7日菏泽5.9级地震异常达11月之久;东区有反映邻区较大地震的“窗口”效应;而中区仅对本区的4.0级以上地震对应较好,对邻区地震对应效果不甚明显。最后对缺震方法的预报意义进行了讨论。
Earthquakes in the three plots of southern Shandong (Lunan) were statistically processed using the earthquake-elimination method. It was observed that all earthquakes of the magnitude 4.5 (M_L, below) occurred in the western area reflected a “missing earthquake” in this area, of which On November 7, 1983, the Heze 5.9-magnitude earthquake lasted for a long time in November; the “window” effect in the eastern area reflected the larger earthquake in the neighboring area; and the metro area only corresponded well to the M≥ 4.0 earthquake in this area. The corresponding effect is not obvious. Finally, the significance of the prediction of missing method is discussed.