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通过微小地震尾波Q值的变化,可以推测出发生在丹波山周围因兵库县南部地震引起的地壳介质非均匀性变化。1987～1996年,统计上可置信的尾波Q值变化是,兵库县南部地震前后,只出现在3.0Hz和4.0Hz两个中心频段的频率上。通过尾波Q值变化和地震活动变化,推测出非均匀区域的尺度为百米至千米,这表明了这个地区介质非均匀性的特征尺度。
Through the variation of the Q value of the coda of the minor earthquakes, it can be inferred that the change of the crustal heterogeneity caused by the earthquake in the southern part of Hyogo around the Tambo mountain. From 1987 to 1996, the statistical credible coda Q value changes are that only appeared in the frequencies of 3.0Hz and 4.0Hz before and after the earthquake in southern Hyogo. Through the change of Q value and the change of seismic activity, it is inferred that the scale of non-uniform region is from 100 meters to 1000 kilometers, which indicates the characteristic scale of medium heterogeneity in this area.