高采样四分量钻孔应变仪记录应变地震波的可靠性分析

The Reliability Analysis of Strain Seismic Waves Recorded by High Sampling Four-component Borehole Strain Meter

自2017年开始,陆续对中国地球物理台网10个钻孔应变测点的数据采集器进行升级,产出了大量的高采样钻孔应变观测数据.利用相关系数和自检精度2个检验四分量观测数据自洽性能的指标,定量分析了台站记录的2020年2月3日成都5.1级和2020年3月25日千岛群岛7.5级地震的应变地震波,结果显示高采样观测数据信度较高.对比分析了10个台站记录的2次地震的震相,证明高采样四分量钻孔应变仪具备记录清晰应变地震波的能力,且其可靠性较高.综合结果证明,高采样四分量钻孔应变观测可进一步为地震学研究提供新的数据资源.

Since 2017,we have upgraded the data collectors in the ten borehole strain stations,it has produced a large number of strain observation data from high sampling boreholes.Using the correlation coefficient and self-check accuracy of the two inspection four component observational data self-consistent performance indicators,we have quantitatively analyzed these stations of strain seismic waves recorded on February 3,2020 in Chengdu M5.1 earthquake and the Kuril islands M7.5 earthquake on March 25,2020.The result shows that reliability of these high sampling observation data is high.In addition,by analyzing the seismic phase of two earthquakes recorded by the ten borehole strain stations,it proved that the four component borehole strain meter high samples have the ability to record clear strain seismic wave,and its reliability is high.Comprehensive results show that high sampling four component borehole strain meter can be further provides new data for the seismological research resources.