南北地震带强震迁移特征及其预测意义

THE MIGRATORY CHARACTER OF STRONG EARTHQUAKES IN THE NORTH-SOUTH SEISMIC BELT AND ITS SIGNIFICANCE FOR PREDICTION

摘要:

在分析南北构造带构造体系的基础上,研究了该带强震的时空动态图象演化.结果表明,南北带的地震活动有如下特征:①经向迁移,其空间演化有步进型和步进折返型两种形态;②远程的快速响应;③诱发地震的链锁分布,该特征反映了强震间的相互耦合,对未来强震具有示踪意义;④时空可公度性.该结果对分析判定本带的地震趋势从而实现正确的预测具有实际意义.

Abstract:

On the basis of analysis about the tectonic systems of the North-South seismic belt,the evolution of time-space dynamic pattern of seismicity is studied. The results show that the seismicity has the characteres as follow:① migration along the latitude direction,there are two kinds of migratory states in space,i.e. stepforward style and stepforward-return style;② the rapid respond in far distance;③ chain distribution of induced earthquakes,this feature indicates the coupling between strong quakes,and supports the trace for the position of future strong events;④ common repeat basis quality in space and time.The conclusions have certain practice values for judging the trend and realizing the correct prediction.