钻孔体应变高采样率观测实验
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摘要
分析TJ-2型钻孔应变仪记录与测震仪记录的结果表明:该应变仪对于100 Hz的采样率有良好的频率响应,能够记录完整的地震波;从近震到极远震,其频响范围与测震仪基本一致,且频响的变化一致性很好,在一定的约束条件下,应变地震波与地震波在时域与频率域能够高度吻合;但该应变仪记录的S波较弱。
On the basis of the analysis of high sample rate of borehole strainmeter data and comparison with seismograph data,we studied the characteristics of these datum.The results show that the TJ-2 borehole volume strainmeter with high sample rate has good frequency response with the 100 Hz sample rate;and it has the ability to record a complete seismic wave;also there are basically the same frequency response range no matter how long the distance from the epicenter,and the frequency response changes are consistent.The high sample rate strain seismic wave and seismic wave can be highly consistent in time domain and frequency domain under some constraint conditions;however,the strainmeter with high sample had a weak response to the S seismic wave.
On the basis of the analysis of high sample rate of borehole strainmeter data and comparison with seismograph data,we studied the characteristics of these datum.The results show that the TJ-2 borehole volume strainmeter with high sample rate has good frequency response with the 100 Hz sample rate;and it has the ability to record a complete seismic wave;also there are basically the same frequency response range no matter how long the distance from the epicenter,and the frequency response changes are consistent.The high sample rate strain seismic wave and seismic wave can be highly consistent in time domain and frequency domain under some constraint conditions;however,the strainmeter with high sample had a weak response to the S seismic wave.
引文
1邱泽华,等.四分量钻孔应变台网汶川地震前的观测应变变化[J].大地测量与地球动力学,2009,(1):1-5.(Qiu Zehua,et al.Observed strain changes from 4-component borehole strainmeter network before 2008Wenchuan earthquake[J].Journal of Geodesy andGeodynamics,2009,(1):1-5)
2邱泽华,等.汶川地震前姑咱台观测的异常应变变化[J].中国科学,2010,40(8):1 031-1 039.(Qiu Zehua,et al.Abnormal strain change of Guza seismic stationbefore the Wenchuan earthquake[J].Scientia SinicaTerrae,2010,40(8):1 031-1 039)
3邱泽华,石耀霖.观测应变阶在地震应力触发研究中的应用[J].地震学报,2004,26(5):481-488.(Qiu Zehuaand Shi Yaolin.Application of observed strain steps to thestudy of remote earthquake stress triggering[J].ActaSeismologica Sinica,2004,26(5):481-488)
4邱泽华,石耀霖.地震造成远距离应力阶变的观测实例[J].中国科学(D辑),2003,33(B04):60-64.(QiuZehua and Shi Yaolin.A case study of long distance stresssteps deduced from the earthquake[J].Science inChina(Series D),2003,33(B04):60-64)
5邱泽华,等.用钻孔应变资料反演同震应力触发断层活动[J].地震学报,2006,28(6):596-602.(Qiu Zehua,etal.Inversion of coseismic stress-triggered fault slipsusing borehole strainmeter observations[J].ActaSeismologica Sinica,2006,28(6):596-602)
6杨选辉,等.测震数采仪记录的钻孔应变[J].中国地震,2011,27(1):65-71.(Yang Xuanhui,et al.Strainrecorded by seismic acquisition unit[J].EarthquakeResearch in China,2011,27(1):65-71)
7邱泽华,等.发展钻孔应变观测的战略构想[J].国际地震动态,2004,301(1):51-56.(Qiu Zehua,et al.Strategic visualization of the borehole strain observationdevelopment[J].Recent Development in WorldSeismology,2004,301(1):51-56)
8李海亮,李宏.钻孔应变观测现状与展望[J].地质学报,2010,84(6):895-900.(Li HaiLiang and Li Hong.Statusand development of borehole strain observation inChina[J].Acta Geologica Sinica,2010,84(6):895-900)
2邱泽华,等.汶川地震前姑咱台观测的异常应变变化[J].中国科学,2010,40(8):1 031-1 039.(Qiu Zehua,et al.Abnormal strain change of Guza seismic stationbefore the Wenchuan earthquake[J].Scientia SinicaTerrae,2010,40(8):1 031-1 039)
3邱泽华,石耀霖.观测应变阶在地震应力触发研究中的应用[J].地震学报,2004,26(5):481-488.(Qiu Zehuaand Shi Yaolin.Application of observed strain steps to thestudy of remote earthquake stress triggering[J].ActaSeismologica Sinica,2004,26(5):481-488)
4邱泽华,石耀霖.地震造成远距离应力阶变的观测实例[J].中国科学(D辑),2003,33(B04):60-64.(QiuZehua and Shi Yaolin.A case study of long distance stresssteps deduced from the earthquake[J].Science inChina(Series D),2003,33(B04):60-64)
5邱泽华,等.用钻孔应变资料反演同震应力触发断层活动[J].地震学报,2006,28(6):596-602.(Qiu Zehua,etal.Inversion of coseismic stress-triggered fault slipsusing borehole strainmeter observations[J].ActaSeismologica Sinica,2006,28(6):596-602)
6杨选辉,等.测震数采仪记录的钻孔应变[J].中国地震,2011,27(1):65-71.(Yang Xuanhui,et al.Strainrecorded by seismic acquisition unit[J].EarthquakeResearch in China,2011,27(1):65-71)
7邱泽华,等.发展钻孔应变观测的战略构想[J].国际地震动态,2004,301(1):51-56.(Qiu Zehua,et al.Strategic visualization of the borehole strain observationdevelopment[J].Recent Development in WorldSeismology,2004,301(1):51-56)
8李海亮,李宏.钻孔应变观测现状与展望[J].地质学报,2010,84(6):895-900.(Li HaiLiang and Li Hong.Statusand development of borehole strain observation inChina[J].Acta Geologica Sinica,2010,84(6):895-900)
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