倾斜矢量图正常年变化破坏的机理研究

根据云南省楚雄、永胜台的倾斜矢量图在强震前正常年变化被破坏的事实,探讨了矢量图面积异常与地震的关系。认为矢量图所围面积的变化与地下水的作用固然有一定的关系,而起决定作用的是地震前应变积累的程度。倾斜矢量图面积的减小可以作为预报的一项参考指标。

RESEARCH ON THE MECHANISM FOR ANOMALOUS VARIATION OF TILT VECTOR DIAGRAM

According, to the anomalis of tilt vector diagram before strong earthquake at Chuxiong and Yong sheng station in Yunnan, in this paper, the relationship between the area anomaly of vector diagram and the earthquake is reseached. The author deems that though there is certain correlation between area variation of vector diagram and effects of ground water, the principal effect is strain accumula tion before earthquake. By such a new view--point, author proposes that the decrement of the area environed by tilt vector diagram could be used as a new predictrion index.