怀来4井水汞前兆异常特征分析

本文介绍了１９９８年张北６．２级地震前水汞的异常变化；多点突跳、变化幅度大和持续时间长是震前水汞异常的特点。同时还根据以往水汞的多次震例，归纳出怀来４井水汞具有形态的多样性，对应距离为９０～２８０ｋｍ，异常出现后１５～４７天内发震等特点。从而加深了对该井水汞异常与地震关系的认识，有助于今后水汞预测地震水平的提高

ANALYSIS OF ANOMALOUS FEATURE OF WATER MERCURY PRECURSOR IN HUAILAI NO.4 WELL

In this paper,the anomalous variation of water merecury befere 1998 Zhangbei M6. 2 earthquake has been introduced.Its variation feature is shown by sharp variati ons in many points,big amplitude of the variation and long time period.At the sa me time,based on earthquakes examples with the water mercury precursor,the follo wing features of the water mercury in Huailai No. 4 well have been concluded:man y kinds of variation shapes,90-280 km distance from the well to the strong earth q uake and 15-47 days time interval from the beginning of the anomalies to the occ urrence of the strong earthquake.These would increase the knowledge on the rela tion of the water mercury precursor in this well with the strong earthquake and be advantage in the rise of the earthquake prediction with the water mercury.