气压对徐州地区三套体应变仪不同影响原因的分析  

Analysis of the causes about the different effects of the atmospheric pressure on three sets of volume strain instruments in Xuzhou

作　　者：李兰生[1] 高力[1] 赵钊 刘晶 高明智[1] 施建江 

机构地区：[1]江苏省地震局徐州地震台,江苏徐州221008 [2]江苏省徐州市地震局台网中心,江苏徐州221009 [3]江苏省新沂市地震局,江苏新沂221400

出　　处：《国际地震动态》2012年第11期23-28,共6页Recent Developments in World Seismology

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.

关 键 词：体应变仪 观测资料 气压影响 耦合 地震预报 

分 类 号：P315.727[天文地球—地震学]