Based on seismometric precursors, the possible scientific basis for the short-term and impending judgement befo r e Zhangbei earthquake (MS6.2, January 10, 1998) is discussed.

• 在对地震学前兆认识的基础上，总结了张北6.；2级地震前作出短临判定的可能依据。分析考虑了由场及源、由中期向短临过渡的认识思路。