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本文对新疆1971—1983年北天山及南天山东段发生的12次Ms≥5.0级地震进行了清理,震前出现弱震条带的有7次,其中变化显著的有3次;2次因其它地震干扰不易分析;2次地震条带不明显。震前弱震条带有以下特征:在新疆较高活动水平下,地震条带往往是原地震带上地震活动强弱的一种变化。某些地震前出现背景性或双条带,一次地震的前震可能是组成条带的重要部分:同一区域的弱震条带具有继承性;地震条带往往是Ms≥6级地震前空区的某些边段。用弱震条带预报地震是困难的,文中对地震条带的具体判据,分析方法以及其它有关问题进行了讨论。
In this paper, 12 Ms≥5.0 earthquakes occurred in the northern Tianshan Mountains and the southern Tianshan Mountains in 1971-1983 were cleaned up. There were seven weak earthquakes occurred before the earthquake, of which 3 significant changes occurred. Interference is not easy to analyze; 2 times the seismic band is not obvious. The weak seismic strips before earthquakes have the following characteristics: Under the high activity level in Xinjiang, seismic strips are often a kind of change in the intensity of the original seismic activity. The occurrence of background or double band before some earthquakes may be an important part of the formation of the band. The weak band in the same area has inheritance. The seismic band is often a Some sections. It is difficult to predict the earthquake with the weak earthquake band. The article discusses the specific criteria, analytical methods and other related issues of the seismic band.