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引言 在1979年4月巴黎国际地震预报讨论会上,苏联学者基里斯—博洛克和美国学者诺波夫等联合发表题为“余震的爆发,强震的长期前兆”的文章,文中提出考察主震后时间间隔e内的余震数,将余震足够多(即“余震爆发”)规定为地震活动性的一种异常图象(B图象),并用其对美国加利福尼亚、日本、新西兰等地震区的地震活动进行后验,取得较好的效果。因此作者们认为余震序列的某些特有性质包含有丰富的前兆信息,用这些特征可以作为地球内部应力和介质强度不稳定度的表征。
Introduction In April 1979 Paris International Conference on Earthquake Prediction, Soviet scholar Kiris Bollock and American scholar Novobov jointly published an article titled “The Outburst of Aftershocks and the Long-Term Precursor of Strong Earthquakes” After the earthquake, the number of aftershocks in the time interval e, the aftershocks enough (that is, “aftershocks”) is defined as an anomalous image of seismicity (B images), and its use in California, Japan, New Zealand and other seismic zones Of the seismic activity after the test, and achieved good results. Therefore, the authors believe that some of the peculiar properties of aftershock sequences contain abundant precursory information that can be used as a proxy for the instability of internal stress and medium strength in the Earth.