摘要
本文从地震的时、空分布特征、区域应力场动态、能量释放方式、b值及震群特征6个方面研究了台湾海峡及其西边地区地震活动的正常动态及异常特征。结果表明，具有前兆意义的变化模式表现为区域地震活动在时间、空间及功能方面的有序性变化，即：（a）地震空间分布由分散转为集中，形成条带或空区；（b）断裂活动由多组转为单一，应力场趋向一致；（c）地震活动水平显示异常增强，能量释放方式由均匀、单一转为加速；（d）b值趋势性下降所显示的能量分形的降维；（e）地震随时间分布的丛集现象或减熵；（f）震群参数显示前兆特征。因此，系统有序度的定量化研究，对于地震预报模型的建立及地震预报突破，将具有十分重要的意义。
In this paper,the normal and abnormal behaviours of seismicity in the Taiwan Strait and the land area to its west have been studied in terms of the characteristics of seismic space and time distribution,stress field trends,energy release,b value and swarm sequence. The results indicate that the variational pattern of premonitor significance shows the seismicity trend in order in respects of space,time and funtion,i. e., (a) the epicentre tends to concentrate and the band or gap is formed; (b) the fractures turn to monotone; (c) the seismicity level anomaly strengthens and the form of energy release turns to accelerate; (d) b value tendentiously drops, displaying the dropping of energy-dimension; (e) the time distribution of events crowds together; (f) the parameters of earthquake swarms displays abnormal. For earthquake prediction,it will be of significance to study the orientation quantitativety.
出处
《台湾海峡》
CAS
CSCD
1994年第2期190-197,共8页
Journal of Oceanography In Taiwan Strait
关键词
地震动态
震源机制
地震预报
台湾
Behaviour of seismicity, focus mechanism, parameters of swarm sequence,earthquake prediction, Taiwan Strait
