利用同台址地脉动记录检测井下地震计水平向方位角

Borehole Seismometer Horizontal Azimuth Detection by Using Microtremors Data at the Same Station

利用波形相关法对地面同台址多套地震计方位角进行对比分析研究,并在江苏盐城、安徽界首、安徽合肥、安徽阜阳、河南航海5个台进行井下地震计方位角对比检测,同时利用远震P波极性法对地面及井下地震计方位角的检测结果进行验证。结果表明:地面观测台站地震计方位角检测中波形相关法、远震P波极性法与陀螺寻北仪检测结果的偏差分别在0.4°、2.9°以内,井下观测台站地震计方位角检测中波形相关法与远震P波极性法检测结果的偏差在5.5°以内。因此,远震P波极性法及波形相关法均可得到较为满意的检测结果。

In this study,a correlation analysis method was used to determine the azimuths obtained from several seismometers deployed at the surface from the same station,and the method was carried out at 5 borehole seismometers deployed in Yancheng, Jiangsu Province, Jieshou, Hefei, Fuyang, Anhui Province, and Hanghai,Henan Province. Meanwhile,we used the teleseism P-wave polarity method to verify the azimuth of the surface and borehole seismometer. The results show that the deviations of the waveform correlation analysis method and teleseism P-wave polarity method from the gyro north seeker detection results in the seismometer azimuth detection of surface seismic stations are within 0. 4° and 2. 9°,respectively. The deviation between the waveform correlation analysis method and the teleseism P-wave polarity method is within 5. 5° in the seismometer azimuth detection of borehole seismic stations. Therefore,both the teleseism P-wave polarity method and the waveform correlation analysis method can obtain satisfactory results.