论文标题
朝向源区域层析成像与源间干涉仪：2018年西波西米亚群临界的剪切波速度
Toward source region tomography with inter-source interferometry: Shear wave velocity from 2018 West Bohemia swarm earthquakes
论文作者
论文摘要
地震干涉法的概念包含了通过互相关技术在接收器或来源之间传播的波的构建。在本研究中，使用尾波的互相关来测量地震位置之间的剪切波的旅行时间，用于2018年西波西米亚地震群的五个事件簇。借助高质量的地震目录，我能够分别确定五个簇区域的剪切波速度。剪切波速度在3.5 km/s至4.2 km/s之间。这种新方法的分辨率由簇的范围给出，比可比的经典层析成像更好。建议在层析成像倒置中使用该方法，并以前所未有的分辨率绘制源区域中的剪切波速度。此外，讨论了焦点机理和衰减特性对互相关函数中最大值的极性和位置的影响。 P波与S波速度的群内比率约为1.68。
The concept of seismic interferometry embraces the construction of waves traveling between receivers or sources with cross-correlation techniques. In the present study cross-correlations of coda waves are used to measure travel times of shear waves between earthquake locations for five event clusters of the 2018 West Bohemia earthquake swarm. With the help of a high quality earthquake catalog, I was able to determine the shear wave velocity in the region of the five clusters separately. The shear wave velocities range between 3.5 km/s and 4.2 km/s. The resolution of this novel method is given by the extent of the clusters and better than for a comparable classical tomography. It is suggested to use the method in a tomographic inversion and map the shear wave velocity in the source region with unprecedented resolution. Furthermore, the influence of focal mechanisms and the attenuation properties on the polarity and location of the maxima in the cross-correlation functions is discussed. The intra-cluster ratio of P wave to S wave velocity is approximately fixed at 1.68.
