钻孔倾斜仪高频实验观测数据的初步分析  

Preliminary Study on Data of Bore-hole Tilter Meter with High Sampling Rate

作　　者：张国红[1] 杨选辉[1] 刘福生[1] 宋朝忠[1] 柳艳智[1] 

机构地区：[1]中国地震局地壳应力研究所地壳动力学重点实验室,北京100085

出　　处：《震灾防御技术》2016年第3期633-640,共8页Technology for Earthquake Disaster Prevention

基　　金：中国地震局"三结合"课题资助

摘　　要：利用测震数采器对昌平台CZB钻孔倾斜仪开展了100次/秒的高频采集实验,记录到了可靠的观测资料,其中蕴含的地震信息也更加丰富。同时利用十三陵台测震资料与昌平台钻孔倾斜高频观测资料进行对比分析,结果表明:两种仪器都记录到了地震波响应,但由于频响特性差异,钻孔倾斜仪记录的地震波所对应的P波震相较弱;通过频谱分析估计钻孔倾斜仪的频响偏低频,其频率上限大致在0.1Hz以内;对于一个近地震事件,钻孔倾斜仪的响应表现出与测震仪完全不一样的形态,其低频响应明显优于高频响应;对于远震,随着震中距的增加,两者响应特性逐渐趋于一致。A seismometer acquisition, with 100Hz sampling rate, has been used in Changping observing station to obtain the output of bore-hole tilter meter（CZB-1）. Plenty of higher frequency data with more earthquake information are recorded. Comparing analysis of our high sampling rate data with the seismic data from Shisanling seismic station, we found that seismic waves can be recorded by the two instruments. However, the tilter meter showed weaker response for P waves, indicating it has a narrow frequency range, lower than 0.1Hz. For a local earthquake, waveform recorded by the tilter meter was totally different from seismometer, and the low-frequency response is better than the higher-frequency response for tilter meter. The response characteristics of the two instruments reached unanimity for a far earthquake with the epicenter distance increasing.

关 键 词：钻孔倾斜仪 测震仪 高频观测 频响性能 地震波 

分 类 号：P315.62[天文地球—地震学]