摘要
通过对徐州地区现有的3台体应变仪不同程度受到气压影响的资料进行对比分析,发现其中2个台的体应变资料受气压影响大,分析出现这种情况的主要原因可能是仪器探头与钻孔耦合得不好造成的。为了减少气压对观测资料的干扰,就需要在仪器下井时做好仪器耦合的基础工作,否则仪器产出的数据将会影响观测资料的使用,受气压严重干扰的资料甚至会误导我们对地震前兆异常的分析和判定。
We analysed the varying effects of the atmospheric pressure on three sets of volume strain instruments in Xuzhou. It is found that two of them were greatly affected by atmospheric pressure, which might be mostly caused by poor coupling between the instru- ment probe and the drill hole. It is suggested that the basic work on the coupling of the in- strument should be done to reduce the disturbance from atmospheric pressure when it is placed into the well. Otherwise, the data would be affected by inadequate coupling, and cor- respondingly the analysis and judgement on the earthquake precursor anomaly would be mis- led by those seriously contaminated data.
出处
《国际地震动态》
2012年第11期23-28,共6页
Recent Developments in World Seismology
关键词
体应变仪
观测资料
气压影响
耦合
地震预报
volume strain instrument
observed data
atmospheric pressure influence
coupling
earthquake prediction
