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本文研究了自1970-1982年沿聊考断裂跨度约为140公里范围内的微震活动特征。结果表明,地震活动的平面分布与断裂带有密切关系,绝大多数地震都分布在断裂带及其两侧。细察之,其东侧地震活动水平高于西侧;南段地震活动水平高于北段,而整个断裂带及其两侧有约一半以上地震又丛集于一个长轴呈北东向的椭圆形“菏泽地震巢”内。地震分布所表现的这种条带性、分段差异性和集中性除受断裂带控制外,还与1937年荷泽7.0级地震有关。此外,还对聊考断裂带南端的地震活动图象进行了初步探讨,指出了一个未来可能发生中强震的3级以上地震围空区。
In this paper, we study the characteristics of microseismic activity within the range of 140 km from 1970 to 1982 along the fault of Chatou test. The results show that the plane distribution of seismic activity is closely related to the fault zone, and the vast majority of earthquakes are distributed on both sides of the fault zone. The seismic activity level in the east is higher than that in the west; the seismic activity level in the south section is higher than that in the north section, and more than half of the earthquakes in the whole fault zone and its two sides are clustered in a northerly ellipse Shape “Heze earthquake nest” within. In addition to being controlled by the fault zone, the banding, segmental variability and concentration exhibited by the earthquake distribution are also related to the 1937 Heze 7.0 Earthquake. In addition, the image of the seismic activity at the southern tip of the fault zone is also discussed, and an area of more than 3 magnitude earthquake that may occur in the future is pointed out.