摘要
强震不仅有近场前兆异常,而且也有远场前兆异常,后者在地震预报中可以起到三个方面的作用:(1)远场前兆异常多在震前的短临阶段准同步地出现,为短临预报提供了较丰富的信息,有助于作出短临预报;(2)远场前兆异常一般具有双重或多重前兆的性质,它们是比较可靠的前兆异常,可为预报地震提供依据;(3)远场前兆异常显示明显的地区,是应力积累较高的地区,往往是后继地震发生的地方,即指出了地震可能发生的地域。因此,对远场前兆异常的研究是十分必要的,可能为地震预报找到一些新的方法,也使我们对前兆异常场和地震成因的认识有所提高。
A strong earthquake has both near-field and far-field precursory anomalies, and the later play the role in 3 aspects for the earthquake prediction: 1) Far-field precursory anomalies occur semi-synchronously in the short period before the earthquake, which provide rich information for the short-term earthquake prediction and make the prediction easily; 2) Far-field precursory anomalies always are the bi-or multi-precursors, and they have been examined by earthquake, so they are reliable anomalies for the prediction of sequential earthquakes; 3) The region where far-field precursory anomalies are significant is the region where has stress concentration and the region where is the location of sequential earthquakes. The result show that it is necessary to learn about the far-field precursory anomalies which may provide a new method for earthquake prediction and make us knew more about precursory anomaly field and seismic causes.
出处
《地震》
CSCD
北大核心
1996年第1期39-44,共6页
Earthquake
关键词
远震源区
地震前兆
短临预报
地震预报
Far-source area, Earthquake precursor, Anomaly, Short-term and impending prediction
