张北6.2级地震震兆特征的综合分析

介绍了１９９８年１月１０日张北６．２级地震前的地震活动情况和前兆观测异常现象，并从实际观测资料出发，综合分析了前兆异常的总体特征，以及伴随地震孕育过程而表现出来的各各前兆场的时、空、强变化特征及其它们之间的相互联系，以追踪方式探讨了长、中、短、临的阶段性变化，通过对所掌握的河北省各种前兆资料进行剖析，可知张北地震前前兆资料的变化，在一定程度上能够反映出一些有意义的震兆信息，但以此给出准确的短临预报

COMPREHENSIVE ANALYSIS OF SEISMIC PRECURSOR CHARACTERISTICS OF ZHANGBEI M6. 2 EARTHQUAKE

This paper has introduced the seismic activity situation before the Zhangbei M6. 2 earthquake on January 10, 1998 and the observed precursory anomalies,and from the actually obseved data,has comprehensively analyzed the general characteristics of precursory anomalies,the time,space and strength variational characteristics of various precursory fields following the correlation between them,and has discussed the stage variations of long-term, mid-term, short and imminent term. By analysis of various precursory data grasped in Hebei Province,it can be known that the variation of the precursor data before Zhangbei earthquake can reflect some significant seismic precursory information on a certain degree,but,by this,the basis is not enough to give an accurate short term and imminent prediction.