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利用十几年来山东地震台网资料,研究了山东内陆地区两次中等强度地震及其外围区几次强震前山东地区出现的地震活动性异常,得到如下认识:中、强地震前的地震活动性异常区域要比其它地球物理(化学)前兆异常区域大;震前近、远场地震活动性异常存在差异:如近场出现地震空区,远场小地震分布不均匀度增加;近场出现低 b 值异常,而远场出现高 b 值异常等。同时指出远、近场异常识别的复杂性。
Based on the data of Shandong Seismological Network for more than a decade, we studied two moderate-intensity earthquakes in the inland area of Shandong Province and their anomalies in seismic activity in Shandong Province before several strong earthquakes in the outlying areas of Shandong Province, and obtained the following findings: earthquakes before moderate and strong earthquakes The active anomalous regions are larger than other anomalous precursors of geophysical (chemical) precursors. Before the earthquake, the anomalies of near and far earthquakes are different. For example, if there is a near-field earthquake area, the distribution of small-scale earthquakes in the far field increases; Abnormal low b value appears, and abnormal b value appears in the far field. At the same time pointed out the far and near field anomaly identification complexity.