2022年门源M_(S)6.9地震同震应变观测

Coseismic Strain Observation of the Menyuan M_(S)6.9 Earthquake in 2022

以2022年门源M_(S)6.9地震为例,将17个台站的四分量钻孔应变仪1 sps采样率的同震应变观测值与利用QSSP软件正演计算得到的同震应变模拟值进行拟合,分析二者的相关性。结果表明,17个台站NS向和EW向的P波波形拟合较好,相关系数平均值分别为0.835和0.842,达到高度相关,表明钻孔应变观测数据可较好地反映地震破裂信息,在理论上进一步验证钻孔应变观测数据可用于地震破裂过程的研究。

This paper takes the Menyuan M_(S)6.9 earthquake in 2022 as an example,fitting the coseismic strain observations of four component borehole strainmeters at 1sps sampling rate from 17 stations with the coseismic strain simulations obtained by using qssp software forward calculation;we then analyze their correlation.The results show that the north-south and east-west P-wave waveforms of 17 stations fit well,and the average correlation coefficients are 0.835 and 0.842,respectively,reaching a high correlation,indicating that the borehole strain observation data can better reflect the seismic fracture information,which further verifies that borehole strain observation data can be used to study the seismic fracture process in theory.