渤海地震前地震活动异常图象再研究

本文在以往工作的基础上对渤海地震前异常地震活动图象进行一次再研究。重点对震前背景空区、小震条带、频次和 b 值等长、中期异常的资料、判据和预报意义作了讨论,并与有关作者的研究结果作了对比。最后指出渤海地震前较为清晰的异常信息。

A RESTUDY OF THE ANOMALOUS PATTERN OF THE EARTHQUAKE ACTIVITIES BEFORE THE BOHAI SEA EARTHQUAKE

A restudy of the anomalous pattern of the earthquake activity before the Bohai Seaearthquake has been carried out in the paper,based on the previous work.The discussion herewill centre on the data of long and medium term anomalies such as the background seismic gap,the stripe of small earthquakes,the frequency of occurrence and b-value etc.,the criterion andthe significance of prediction,compared with the results of others.The clear information ofanomalies before the Bohai Sea earthquake is suggested in the end.