永春井水位对远大地震的记震能力及同震效应特征分析

Analysis of the Ability of Recording Teleseismic and Characteristics of Coseismic Effect Recorded by the YongChun Well Water Level

以永春井水位记录到的远大地震的同震效应为研究对象,分析该井水位的记震能力,发现2007年9月前后该水位记震能力有所提高,可能原因是2007年后福建省地震强度和频度明显增强,在地震孕育过程中由于区域应力场的变化使得含水层受力状态发生变化,从而引起井孔记震能力发生变化。研究还得出该水位同震效应特征:水位同震效应最大震幅总体上与震级成正比,与震中距反比;该井的记震能力有一定的方向性。

The paper studies coseismic effect of the great earthquake and teleseismic recorded by the YongChun well water level.The ability of recording earthquake of the YongChun well water level is improved before and after Septermber 2007.This phenomenon is probably caused by earthquake intensity and frequency of Fujian province.During the process of earthquake preparation,the change of the regional stress field leads to the change of the stress state of the aquifer,which caused the changes of the ability of recording earthquakes of the YongChun well.The paper also elaborates the characteristics of coseismic effect of this well water level：the maximum amplitude coseismic effect of this well water is directly proportional to magnitude and is inversely proportional to the epicentral distance overall.The ability of recording earthquakes of the same well has certain direct.